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in category pediatrics

282 results found. For more information, click each entry to expand.

1: Preliminary Evidence on Long COVID in children
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Posted 26 Jan 2021

Preliminary Evidence on Long COVID in children
21,571 downloads medRxiv pediatrics

Danilo Buonsenso, Daniel Munblit, Cristina De Rose, Dario Sinatti, Antonia Ricchiuto, Angelo Carfi, Piero Valentini

There is increasing evidence that adult patients diagnosed with acute COVID-19 suffer from Long COVID initially described in Italy. To date, data on Long COVID in children are lacking. We assessed persistent symptoms in pediatric patients previously diagnosed with COVID-19. More than a half reported at least one persisting symptom even after 120 days since COVID-19, with 42.6% being impaired by these symptoms during daily activities. Symptoms like fatigue, muscle and joint pain, headache , insomnia, respiratory problems and palpitations were particularly frequent, as also described in adults. The evidence that COVID-19 can have long-term impact children as well, including those with asymptomatic/paucisymptomatic COVID-19, highlight the need for pediatricians, mental health experts and policy makers of implementing measures to reduce impact of the pandemic on child s health.

2: Newborn antibodies to SARS-CoV-2 detected in cord blood after maternal vaccination
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Posted 05 Feb 2021

Newborn antibodies to SARS-CoV-2 detected in cord blood after maternal vaccination
12,997 downloads medRxiv pediatrics

Paul D Gilbert, Chad A Rudnick

Background: Maternal vaccination for Influenza and TDaP have been well studied in terms of safety and efficacy for protection of the newborn by placental passage of antibodies. Similar newborn protection would be expected after maternal vaccination against SARS-CoV-2 (the virus responsible for COVID-19). There is a significant and urgent need for research regarding safety and efficacy of vaccination against SARS-CoV-2 during pregnancy. Here, we report the first known case of an infant with SARS-CoV-2 IgG antibodies detectable in cord blood after maternal vaccination. Case presentation: A vigorous, healthy, full-term female was born to a COVID-19 naive mother who had received a single dose of mRNA vaccine for SARS-CoV-2 three weeks prior to delivery. Cord blood antibodies (IgG) were detected to the S-protein of SARS-CoV-2 at time of delivery. Conclusion: Here, we report the first known case of an infant with SARS-CoV-2 IgG antibodies detectable in cord blood after maternal vaccination.

3: Reduction in preterm births during the COVID-19 lockdown in Ireland: a natural experiment allowing analysis of data from the prior two decades.
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Posted 05 Jun 2020

Reduction in preterm births during the COVID-19 lockdown in Ireland: a natural experiment allowing analysis of data from the prior two decades.
6,289 downloads medRxiv pediatrics

Roy K Philip, Helen Purtill, Elizabeth Reidy, Mandy Daly, Mendinaro Imcha, Deirdre McGrath, Nuala H O'Connell, Colum P Dunne

Background: Aetiology of preterm birth (PTB) is heterogeneous and preventive strategies remain elusive. Socio-environmental measures implemented as Ireland s prudent response to the SARS-CoV-2 virus (COVID-19) pandemic represented, in effect, a national lockdown and have possibly influenced the health and wellbeing of pregnant women and unborn infants. Cumulative impact of such socio-environmental factors operating contemporaneously on PTB has never been assessed before. Methods: Regional PTB trends of very low birth weight (VLBW) infants in one designated health area of Ireland over two decades were analysed. Poisson regression and rate ratio analyses with 95% CI were conducted. Observed regional data from January to April 2020 were compared to historical regional and national data and forecasted national figures for 2020. Results: Poisson regression analysis found that the regional historical VLBW rate per 1000 live births for January to April, 2001 to 2019 was 8.18 (95% CI: 7.21, 9.29). During January to April 2020, an unusually low VLBW rate of just 2.17 per 1000 live births was observed. The rate ratio of 3.77 (95% CI: 1.21, 11.75), p = 0.022, estimates that for the last two decades there was, on average, 3.77 times the rate of VLBW, compared to the period January to April 2020 during which there is a 73% reduction. National Irish VLBW rate for 2020 is forecasted to be reduced to 400 per 60,000 births compared to historical 500 to 600 range. Conclusion: An unprecedented reduction in PTB of VLBW infants was observed in one health region of Ireland during the COVID-19 lockdown. Potential determinants of this unique temporal trend reside in the summative socio-environmental impact of the COVID-19 dictated lockdown. Our findings, if mirrored in other regions that have adopted similar measures to combat the pandemic, demonstrate the potential to evaluate these implicated interdependent behavioural and socio-environmental modifiers to positively influence PTB rates globally.

4: Changes in premature birth rates during the Danish nationwide COVID-19 lockdown: a nationwide register-based prevalence proportion study
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Posted 23 May 2020

Changes in premature birth rates during the Danish nationwide COVID-19 lockdown: a nationwide register-based prevalence proportion study
5,783 downloads medRxiv pediatrics

Gitte Hedermann, Paula L Hedley, Marie Baekvad-Hansen, Henrik Hjalgrim, Klaus Rostgaard, Porntiva Poorisrisak, Morten Breindahl, Mads Melbye, David Hougaard, Michael Christiansen, Ulrik Lausten-Thomsen

Objectives To explore the impact of COVID-19 lockdown on premature birth rates in Denmark Design Nationwide register-based prevalence proportion study. Participants 31,180 live singleton infants born in Denmark between March 12, and April 14, from 2015 to 2020 Main outcome measures The Main outcome measure was the odds ratio of premature birth, per preterm category, during the lockdown period compared with the calendar match period in the five previous years. Results A total of 31 180 newborns were included in the study period, of these 58 were born extremely premature (gestational age below 28 weeks). The distribution of gestational ages was significantly different (p = 0.004) during the lockdown period compared to the previous five years. The extremely premature birth rate during the lockdown was significantly lower than the corresponding mean rate for the same dates in the previous years (odds ratio 0.09 [95 % CI 0.01 - 0.04], p < 0.001). No significant difference between the lockdown and previous years was found for other gestational age categories. Conclusions The birth rate of extremely premature infants decreased significantly (~90 % reduction) during the Danish nationwide lockdown from a stable rate in the preceding five years. The reasons for this decrease are unclear. Identification of possible causal mechanisms might stimulate changes in clinical practice. Ideally, some cases of extreme prematurity are preventable which may decrease infant morbidity and mortality.

5: COVID-19 mRNA vaccine is not detected in human milk
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Posted 08 Mar 2021

COVID-19 mRNA vaccine is not detected in human milk
4,761 downloads medRxiv pediatrics

Yarden Golan, Mary Prahl, Arianna Cassidy, Christine Y Lin, Nadav Ahituv, Valerie J Flaherman, Stephanie L. Gaw

Several countries have recently approved the use of mRNA vaccines against COVID-19 under an emergency use authorization. However, no pregnant or lactating individuals were included in the Phase 3 clinical trials of these vaccines despite belonging to a group at high risk for severe complications of COVID-19 infection. We show here that the mRNA from anti-COVID vaccines is not detected in human breast milk samples collected 4-48 hours post-vaccine. These results strengthen the recommendation of ABM and WHO that lactating individuals who receive the anti-COVID-19 mRNA-based vaccine should continue to breastfeed their infants uninterrupted.

6: Clinical Manifestations of Children with COVID-19: a Systematic Review
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Posted 03 Apr 2020

Clinical Manifestations of Children with COVID-19: a Systematic Review
4,515 downloads medRxiv pediatrics

Tiago H. de Souza, José A. Nadal, Roberto J. N. Nogueira, Ricardo M. Pereira, Marcelo B. Brandão

ContextThe coronavirus disease 2019 (COVID-19) outbreak is an unprecedented global public health challenge, leading to thousands of deaths every day worldwide. Despite the epidemiological importance, clinical patterns of children with COVID-19 remain unclear. ObjectiveTo describe the clinical, laboratorial and radiological characteristics of children with COVID-19. Data SourcesThe Medline database was searched between December 1st 2019 and March 30th 2020. Study SelectionInclusion criteria were: (1) studied patients younger than 18 years old; presented original data from cases of COVID-19 confirmed by reverse-transcription polymerase chain reaction; and (3) contained descriptions of clinical manifestations, laboratory tests or radiological examinations. Data ExtractionNumber of cases, gender, age, clinical manifestations, laboratory tests, radiological examinations and outcomes. ResultsA total of 34 studies (1,118 cases) were included. From all the cases, 1,111 had their severity classified: 14.3% were asymptomatic, 36.4% were mild, 46.0% were moderate, 2.2% were severe and 1.2% were critical. The most prevalent symptom was fever (16.3%), followed by cough (14.4%), nasal symptoms (3.6%), diarrhea (2.7%) and nausea/vomiting (2.5%). One hundred forty-five (12.9%) children were diagnosed with pneumonia and 43 (3.8%) upper airway infections were reported. Reduced lymphocyte count were reported in 13.1% of cases. Abnormalities on computed tomography were reported in 62.7% of cases. The most prevalent abnormalities reported were ground glass opacities, patchy shadows and consolidations. Only one death was reported. ConclusionsClinical manifestations of children with COVID-19 differ widely from adults cases. Fever and respiratory symptoms should not be considered a hallmark of COVID-19 in children.

7: The Immunology of Multisystem Inflammatory Syndrome in Children with COVID-19
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Posted 10 Jul 2020

The Immunology of Multisystem Inflammatory Syndrome in Children with COVID-19
3,704 downloads medRxiv pediatrics

Camila Rosat Consiglio, Nicola Cotugno, Fabian Sardh, Christian Pou, Donato Amodio, Sonia Zicari, Alessandra Ruggiero, Giuseppe Rubens Pascucci, Lucie Rodriguez, Veronica Santilli, Tessa Campbell, Yenan Bryceson, Ziyang Tan, Daniel Eriksson, Jun Wang, Tadepally Lakshmikanth, Alessandra Marchesi, Andrea Campana, Alberto Villani, Paolo Rossi, the CACTUS study team, Nils Landegren, Paolo Palma, Petter Brodin

SARS-CoV2 infection is typically very mild and often asymptomatic in children. A complication is the rare Multisystem Inflammatory Syndrome in Children (MIS-C) associated with COVID-19, presenting 4-6 weeks after infection as high fever and organ dysfunction and strongly elevated markers of inflammation. The pathogenesis is unclear but has overlapping features with Kawasaki disease suggestive of vasculitis and a likely autoimmune etiology. We apply systems-level analyses of blood immune cells, cytokines and autoantibodies in healthy children, children with Kawasaki disease enrolled prior to COVID-19, children infected with SARS-CoV2 and children presenting with MIS-C. We find that the inflammatory response in MIS-C differs from the cytokine storm of severe acute COVID-19, is more similar to Kawasaki disease, but also differ from this with respect to T-cell subsets, IL-17A and biomarkers associated with arterial damage. Finally, autoantibody profiling suggests endoglin, an endothelial glycoprotein as one of several candidate targets of autoantibodies in MIS-C.

8: Post-infectious inflammatory disease in MIS-C features elevated cytotoxicity signatures and autoreactivity that correlates with severity
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Posted 04 Dec 2020

Post-infectious inflammatory disease in MIS-C features elevated cytotoxicity signatures and autoreactivity that correlates with severity
2,941 downloads medRxiv pediatrics

Anjali Ramaswamy, Nina N. Brodsky, Tomokazu S. Sumida, Michela Comi, Hiromitsu Asashima, Kenneth B Hoehn, Ningshan Li, Yunqing Liu, Aagam Shah, Neal G. Ravindra, Jason Bishai, Alamzeb Khan, William Lau, Brian Sellers, Neha Bansal, Rachel Sparks, Avraham Unterman, Victoria Habet, Andrew J. Rice, Jason Catanzaro, Harsha Chandnani, Merrick Lopez, Naftali Kaminski, Charles S. Dela Cruz, John S. Tsang, Zuoheng Wang, Xiting Yan, Steven H. Kleinstein, David van Dijk, Richard W. Pierce, David A. Hafler, Carrie L. Lucas

Multisystem inflammatory syndrome in children (MIS-C) is a life-threatening post-infectious complication occurring unpredictably weeks after mild or asymptomatic SARS-CoV2 infection in otherwise healthy children. Here, we define immune abnormalities in MIS-C compared to adult COVID-19 and pediatric/adult healthy controls using single-cell RNA sequencing, antigen receptor repertoire analysis, unbiased serum proteomics, and in vitro assays. Despite no evidence of active infection, we uncover elevated S100A-family alarmins in myeloid cells and marked enrichment of serum proteins that map to myeloid cells and pathways including cytokines, complement/coagulation, and fluid shear stress in MIS-C patients. Moreover, NK and CD8 T cell cytotoxicity genes are elevated, and plasmablasts harboring IgG1 and IgG3 are expanded. Consistently, we detect elevated binding of serum IgG from severe MIS-C patients to activated human cardiac microvascular endothelial cells in culture. Thus, we define immunopathology features of MIS-C with implications for predicting and managing this SARS-CoV2-induced critical illness in children.

9: Assessment of spread of SARS-CoV-2 by RT-PCR and concomitant serology in children in a region heavily affected by COVID-19 pandemic
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Posted 14 Jun 2020

Assessment of spread of SARS-CoV-2 by RT-PCR and concomitant serology in children in a region heavily affected by COVID-19 pandemic
2,752 downloads medRxiv pediatrics

Robert Cohen, Camille Jung, Naim Ouldali, Aurelie Sellam, Christophe Batard, Fabienne Cahn-Sellem, Annie Elbez, Alain Wollner, Olivier Romain, Francois Corrard, Said Aberrane, Nathalie Soismier, Rita Creidy, Mounira Smati-Lafarge, Odile Launay, Stephane Bechet, Emmanuelle Varon, Corinne Levy

Background. Several studies indicated that children seem to be less frequently infected with SARS-CoV-2 and potentially less contagious. To examine the spread of SARS-CoV-2 we combined both RT-PCR testing and serology in children in the most affected region in France, during the COVID-19 epidemic. Methods. From April 14, 2020 to May 12, 2020, we conducted a cross-sectional prospective, multicenter study. Healthy controls and pauci-symptomatic children from birth to age 15 years were enrolled by 27 ambulatory pediatricians. A nasopharyngeal swab was taken for detection of SARS-CoV-2 by RT-PCR and a microsample of blood for micro-method serology. Results. Among the 605 children, 322 (53.2%) were asymptomatic and 283 (46.8%) symptomatic. RT-PCR testing and serology were positive for 11 (1.8%) and 65 (10.7%) of all children, respectively. Only 3 children were RT-PCR-positive without any antibody response have been detected. The frequency of positivity on RT-PCR for SARS-CoV-2 was significantly higher in children with positive serology than those with a negative one (12.3% vs 0.6%, p<0.001). Contact with a person with proven COVID-19 increased the odds of positivity on RT-PCR (OR 7.8, 95% confidence interval [1.5; 40.7]) and serology (15.1 [6.6; 34.6]). Conclusion. In area heavily affected by COVID-19, after the peak of the first epidemic wave and during the lockdown, the rate of children with positive SARS-CoV-2 RT-PCR was very low (1.8%), but the rate of positive on serology was higher (10.7%). Most of PCR positive children had at the same time, positive serology suggesting a low risk of transmission.

10: The clinical and epidemiological features and hints of 82 confirmed COVID-19 pediatric cases aged 0-16 in Wuhan, China
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Posted 18 Mar 2020

The clinical and epidemiological features and hints of 82 confirmed COVID-19 pediatric cases aged 0-16 in Wuhan, China
2,460 downloads medRxiv pediatrics

Hui Yu, Qinzhen Cai, Xiang Dai, Xiuzhen Liu, Hong Sun

Although COVID-19 pediatric patients just account for 1% of the overall cases, they are nonnegligible invisible infection sources. We quantitatively analyzed the clinical and epidemiological features of 82 confirmed cases aged 0-16 admitted to Wuhan Childrens Hospital, which are expected to shed some lights onto the pediatric diagnosis and therapy.

11: Mapping Systemic Inflammation and Antibody Responses in Multisystem Inflammatory Syndrome in Children (MIS-C)
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Posted 06 Jul 2020

Mapping Systemic Inflammation and Antibody Responses in Multisystem Inflammatory Syndrome in Children (MIS-C)
2,434 downloads medRxiv pediatrics

Conor Gruber, Roosheel Patel, Rebecca Trachman, Lauren Lepow, Fatima Amanat, Florian Krammer, Karen M. Wilson, Kenan Onel, Daniel Geanon, Kevin Tuballes, Manishkumar Patel, Konstantinos Mouskas, Nicole Simons, Vanessa Barcessat, Diane Del Valle, Samantha Udondem, Gurpawan Kang, Sandeep Gangadharan, George Ofori-Amanfo, Adeeb H Rahman, Seunghee Kim-Schulze, Alexander Charney, Sacha Gnjatic, Bruce Gelb, Miriam Merad, Dusan Bogunovic

Initially, the global outbreak of COVID-19 caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spared children from severe disease. However, after the initial wave of infections, clusters of a novel hyperinflammatory disease have been reported in regions with ongoing SARS-CoV-2 epidemics. While the characteristic clinical features are becoming clear, the pathophysiology remains unknown. Herein, we report on the immune profiles of eight Multisystem Inflammatory Syndrome in Children (MIS-C) cases. We document that all MIS-C patients had evidence of prior SARS-CoV-2 exposure, mounting an antibody response with normal isotype-switching and neutralization capability. We further profiled the secreted immune response by high-dimensional cytokine assays, which identified elevated signatures of inflammation (IL-18 and IL-6), lymphocytic and myeloid chemotaxis and activation (CCL3, CCL4, and CDCP1) and mucosal immune dysregulation (IL-17A, CCL20, CCL28). Mass cytometry immunophenotyping of peripheral blood revealed reductions of mDC1 and non-classical monocytes, as well as both NK- and T- lymphocytes, suggesting extravasation to affected tissues. Markers of activated myeloid function were also evident, including upregulation of ICAM1 and FcR1 in neutrophil and non-classical monocytes, well-documented markers in autoinflammation and autoimmunity that indicate enhanced antigen presentation and Fc-mediated responses. Finally, to assess the role for autoimmunity secondary to infection, we profiled the auto-antigen reactivity of MIS-C plasma, which revealed both known disease-associated autoantibodies (anti-La) and novel candidates that recognize endothelial, gastrointestinal and immune-cell antigens. All patients were treated with anti- IL6R antibody or IVIG, which led to rapid disease resolution tracking with normalization of inflammatory markers.

12: SARS-CoV-2 Seroepidemiology in Children and Adolescents
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Posted 31 Jan 2021

SARS-CoV-2 Seroepidemiology in Children and Adolescents
2,250 downloads medRxiv pediatrics

Rebecca E Levorson, Erica Christian, Brett Hunter, Jasdeep Sayal, Jiayang Sun, Scott A Bruce, Stephanie Garofalo, Matthew Southerland, Svetlana Ho, Shira Levy, Christopher Defillipi, Lilian Peake, Frederick C Place, Suchitra K Hourigan

Background: Pediatric SARS-CoV-2 data remain limited and seropositivity rates in children were reported as <1% early in the pandemic. Seroepidemiologic evaluation of SARS-CoV-2 in children in a major metropolitan region of the United States was performed.Methods: Children and adolescents [&le;] 19 years were enrolled in a cross-sectional, observational study of SARS-CoV-2 seroprevalence from July-October 2020 in Northern Virginia, United States. Demographic, health, and COVID-19 exposure information was collected, and blood was analyzed for SARS-CoV-2 spike protein total antibody. Risk factors associated with SARS-CoV-2 seropositivity were analyzed. Orthogonal antibody testing was performed, and samples were evaluated for responses to different antigens. Results: In 1038 children, the anti-SARS-CoV-2 total antibody positivity rate was 8.5%. After multivariate logistic regression, significant risk factors included Hispanic ethnicity, public or absent insurance, a history of COVID-19 symptoms, exposure to person with COVID-19, a household member positive for SARS-CoV-2 and multi-family or apartment dwelling without a private entrance. 66% of seropositive children had no symptoms of COVID-19. Orthogonal antibody testing with a receptor binding domain specific antigen revealed a high concordance of 80.5%. Children also demonstrated a robust immune response to the nucleocapsid antigen. Conclusions: A much higher burden of SARS-CoV-2 infection, as determined by seropositivity, was found in children than previously reported. This was also higher compared to adults in the same region at a similar time. Contrary to prior reports, we determined children shoulder a significant burden of COVID-19 infection. The role of pediatric infection and transmission must be considered in COVID-19 mitigation strategies including vaccination.

13: BNT162b2 vaccination induces SARS-CoV-2 specific antibody secretion into human milk with minimal transfer of vaccine mRNA
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Posted 29 Apr 2021

BNT162b2 vaccination induces SARS-CoV-2 specific antibody secretion into human milk with minimal transfer of vaccine mRNA
2,152 downloads medRxiv pediatrics

Jia Ming Low, Yue Gu, Melissa Shu Feng Ng, Amin Zubair, Le Ye Lee, Yvonne Peng Mei Ng, Bhuvaneshwari D/O Shunmuganathan, Yuxi Niu, Rashi Gupta, Paul Tambyah, Paul A Macary, Liang Wei Wang, Youjia Zhong

Importance: To examine the impact of SARS-CoV-2 vaccination of lactating mothers on human milk Objective: (1) To quantify SARS-CoV-2-specific immunoglobulin A (IgA) and immunoglobulin G (IgG) in human milk of lactating mothers who received the BNT162b2 vaccine, with reference to a cohort convalescent from antenatal COVID-19, and healthy lactating mothers. (2) To detect and quantify vaccine mRNA in human milk after BNT162b2 vaccination. Design: Gestational Immunity For Transfer 2 (GIFT-2) is a prospective cohort study of lactating mothers who were due to receive two doses of BNT162b2 vaccine, recruited between 5th February 2021 and 9th February 2021. Setting: Lactating healthcare workers living in Singapore Participants: Convenience sample of ten lactating healthcare workers. Human milk samples were collected at four time points: pre-vaccination, 1 to 3 days after dose one, 7 to 10 days after dose one, and 3 to 7 days after dose two of the BNT162b2 vaccine. Exposure: Two doses of the BNT162b2 vaccine 21 days apart. Main Outcome and Measure: (i) SARS-CoV-2-specific IgA and IgG in human milk of lactating mothers who received BNT162b2 vaccine, (ii) Detection and quantification of vaccine mRNA in human milk after BNT162b2 vaccination. Results: Ten lactating healthcare workers aged 32.5 years (range 29 to 42) were recruited, with 40 human milk samples collected and analysed. SARS-CoV-2-specific IgA was predominant in human milk of lactating mothers who received BNT162b2 vaccine. The sharpest rise in antibody production was 3 to 7 days after dose two of the BNT162b2 vaccine, with medians of 1110 picomolar of anti-SARS-CoV-2 spike and 374 picomolar of anti-Receptor Binding Domain IgA. Vaccine mRNA was detected only on rare occasions, at a maximum concentration of 2 ng/mL. Infants had no reported adverse events, up to 28 days after ingestion of post-vaccination human milk. Conclusions and Relevance: In this cohort of ten lactating mothers following BNT162b2 vaccination, nine (90%) produced SARS-CoV-2 IgA, and ten (100%) produced IgG in human milk with minimal amounts of vaccine mRNA. Lactating individuals should continue breastfeeding in an uninterrupted manner after receiving mRNA vaccination for SARS-CoV-2.

14: Seroprevalence of SARS-CoV-2 antibodies in children - A prospective multicentre cohort study.
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Posted 02 Sep 2020

Seroprevalence of SARS-CoV-2 antibodies in children - A prospective multicentre cohort study.
2,124 downloads medRxiv pediatrics

Thomas Waterfield, Chris Watson, Rebecca Moore, Kathryn Ferris, Claire Tonry, Alison P Watt, Claire McGinn, Steven Foster, Jennifer Evans, Mark D Lyttle, Shazaad Ahmad, Shamez Ladhani, Michael Corr, Lisa McFetridge, Hannah Mitchell, Kevin Brown, Gayatric Amirthalingam, Julie-Ann Maney, Sharon Christie

Background Studies based on molecular testing of oral/nasal swabs underestimate SARS-CoV-2 infection due to issues with test sensitivity and timing of testing. The objective of this study was to report the presence of SARS-CoV-2 antibodies, consistent with previous infection, and to report the symptomatology of infection in children. Design This multicentre observational cohort study, conducted between 16th April - 3rd July 2020 at 5 UK sites, aimed to recruit 900 children aged 2 to 15 years of age. Participants provided blood samples for SARS-CoV-2 antibody testing and data were gathered regarding unwell contacts and symptoms. Results 1007 participants were enrolled, and 992 were included in the final analysis. The median age of participants was 10.1 years. There were 68 (6.9%) participants with positive SARS-CoV-2 antibody tests indicative of previous SARS-CoV-2 infection. Of these, 34/68 (50%) reported no symptoms. The presence of antibodies and the mean antibody titre was not influenced by age. Following multivariate analysis 4 independent variables were identified as significantly associated with SARS-CoV-2 infection. These were: known infected household contact; fatigue; gastrointestinal symptoms; and changes in sense of smell or taste. Discussion In this study children demonstrated similar antibody titres in response to SARS-CoV-2 irrespective of age. The symptoms of SARS-CoV-2 infection in children were subtle but of those reported, fatigue, gastrointestinal symptoms and changes in sense of smell or taste were most strongly associated with antibody positivity. Registration This study was registered at https://www.clinicaltrials.gov (trial registration: NCT04347408) on the 15/04/2020.

15: Maternal and child outcomes reported by breastfeeding women following mRNA COVID-19 vaccination
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Posted 25 Apr 2021

Maternal and child outcomes reported by breastfeeding women following mRNA COVID-19 vaccination
1,702 downloads medRxiv pediatrics

Kerri Bertrand, Gordon Honerkamp-Smith, Christina D Chambers

INTRODUCTION Clinical trials for both the Pfizer-BioNTech BNT162b2 and Moderna mRNA-1273 COVID-19 vaccines demonstrated their ability to prevent infection and severe disease, leading to emergency use authorization by the U.S. Food and Drug Administration. The American College of Obstetrics and Gynecology and The Society for Maternal Fetal Medicine have recommended that these novel mRNA vaccines be made available for lactating women. However, initial trials excluded breastfeeding women, leading to questions about their safety.3 One study of 31 breastfeeding women who received one of the mRNA vaccines found that >60% reported side effects.4 We sought to evaluate a larger sample of vaccinated breastfeeding women and their children.

16: The innate and adaptive immune landscape of SARS-CoV-2-associated Multisystem Inflammatory Syndrome in Children (MIS-C) from acute disease to recovery.
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Posted 07 Aug 2020

The innate and adaptive immune landscape of SARS-CoV-2-associated Multisystem Inflammatory Syndrome in Children (MIS-C) from acute disease to recovery.
1,653 downloads medRxiv pediatrics

Eleni Syrimi, Eanna Fennell, Alex G Richter, Pavle Vrljicak, Richard Stark, Sascha Ott, Paul G Murray, Eslam Al-abadi, Ashish Chikermane, Pamela Dawson, Scott Hackett, Deepthi Jyothish, Hari Krishnan Kanthimathinathan, Sean Monaghan, Prasad Nagakumar, Naeem Khan, Sian Faustini, Barnaby R Scholefield, Steven Welch, Pamela Kearns, Graham Taylor

Multisystem inflammatory syndrome in children (MIS-C) is a life-threatening disease occurring several weeks after severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. MIS-C has overlapping clinical features with Kawasaki Disease (KD), a rare childhood vasculitis. MIS-C therapy is largely based on KD treatment protocols but whether these diseases share underpinning immunological perturbations is unknown. We performed deep immune profiling on blood samples from healthy children and patients with MIS-C or KD. Acute MIS-C patients had highly activated neutrophils, classical monocytes and memory CD8+ T-cells; increased frequencies of B-cell plasmablasts and CD27- IgD- double-negative B-cells; and increased levels of pro-inflammatory (IL6, IL18, IP10, MCP1) but also anti-inflammatory (IL-10, IL1-RA, sTNFR1, sTNFR2) cytokines. Increased neutrophil count correlated with inflammation,cardiac dysfunction and disease severity. Two days after intravenous immunoglobulin (IVIG) treatment, MIS-C patients had increased CD163 expression on monocytes, expansion of a novel population of immature neutrophils, and decreased levels of pro- and anti-inflammatory cytokines in the blood accompanied by a transient increase in arginase in some patients. Our data show MIS-C and KD share substantial immunopathology and identify potential new mechanisms of action for IVIG, a widely used anti-inflammatory drug used to treat MIS-C, KD and other inflammatory diseases.

17: A Mini Review on Current Clinical and Research Findings for Children Suffering from COVID-19
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Posted 04 Apr 2020

A Mini Review on Current Clinical and Research Findings for Children Suffering from COVID-19
1,629 downloads medRxiv pediatrics

Xiao Li, Kun Qian, Ling-ling Xie, Xiu-juan Li, Min Cheng, Li Jiang, Björn W. Schuller

BackgroundAs the novel coronavirus triggering COVID-19 has broken out in Wuhan, China and spread rapidly worldwide, it threatens the lives of thousands of people and poses a global threat on the economies of the entire world. However, infection with COVID-19 is currently rare in children. ObjectiveTo discuss the latest findings and research focus on the basis of characteristics of children confirmed with COVID-19, and provide an insight into the future treatment and research direction. MethodsWe searched the terms "COVID-19 OR coronavirus OR SARS-CoV-2" AND "Pediatric OR children" on PubMed, Embase, Cochrane library, NIH, CDC, and CNKI. The authors also reviewed the guidelines published on Chinese CDC and Chinese NHC. ResultsWe included 25 published literature references related to the epidemiology, clinical manifestation, accessary examination, treatment, and prognosis of pediatric patients with COVID-19. ConclusionThe numbers of children with COVID-19 pneumonia infection are small, and most of them come from family aggregation. Symptoms are mainly mild or even asymptomatic, which allow children to be a risk factor for transmission. Thus, strict epidemiological history screening is needed for early diagnosis and segregation. This holds especially for infants, who are more susceptible to infection than other age groups in pediatric age, but have most likely subtle and unspecific symptoms. They need to be paid more attention to. CT examination is a necessity for screening the suspected cases, because most of the pediatric patients are mild cases, and plain chest X-ray do not usually show the lesions or the detailed features. Therefore, early chest CT examination combined with pathogenic detection is a recommended clinical diagnosis scheme in children. The risk factors which may suggest severe or critical progress for children are: Fast respiratory rate and/or; lethargy and drowsiness mental state and/or; lactate progressively increasing and/or; imaging showed bilateral or multi lobed infiltration, pleural effusion or rapidly expending of lesions in a short period of time and/or; less than 3 months old or those who underly diseases. For those critical pediatric patients with positive SARS-CoV-2 diagnosis, polypnea may be the most common symptom. For treatment, the elevated PCT seen in children in contrast to adults suggests that the underlying coinfection/secondary infection may be more common in pediatric patients and appropriate antibacterial treatment should be considered. Once cytokine storm is found in these patients, anti-autoimmune or blood-purifying therapy should be given in time. Furthermore, effective isolation measures and appropriate psychological comfort need to be provided timely.

18: Providing breastfeeding support during the COVID-19 pandemic: Concerns of mothers who contacted the Australian Breastfeeding Association
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Posted 20 Jul 2020

Providing breastfeeding support during the COVID-19 pandemic: Concerns of mothers who contacted the Australian Breastfeeding Association
1,592 downloads medRxiv pediatrics

Naomi Hull, Renee L Kam, Karleen D Gribble

Concerns of mothers seeking breastfeeding support during the COVID-19 pandemic, and the experiences of Australian Breastfeeding Association (ABA) volunteers who assisted them, were explored via an online survey. Surveys were completed 16th March to 18th of May 2020 and described the COVID-19 related concerns of 340 individuals. One hundred and thirty six mothers (64%) sought support to protect their infants by continuing breastfeeding, increasing milk supply, or restarting breastfeeding. Mothers were commonly stressed, isolated and needing reassurance. Thirty four (10%) raised concerns about COVID-19 and breastfeeding safety. One hundred and twenty nine (61%) informed volunteers they were unable to access face-to-face health services because of fear or unavailability. Most common breastfeeding concerns were related to insufficient milk or weight gain, painful breasts, relactation, and reducing supplemental milk. Volunteers reported mothers were worried stress had reduced milk supply, that milk supply concerns were exacerbated by the inability to weigh infants, and that seeking medical treatment was being delayed. ABA volunteers stated they felt supported and confident assisting mothers while also expressing distress at mothers situation. ABAs role in emergency response should be recognised and national planning for infant and young child feeding in emergencies, must be urgently developed, funded, and implemented.

19: Soft drinks can be misused to give false false positive SARS-CoV-2 lateral flow device results
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Posted 05 Jul 2021

Soft drinks can be misused to give false false positive SARS-CoV-2 lateral flow device results
1,539 downloads medRxiv pediatrics

Louise Oni, Daniel Hawcutt, Iain Buchan, Malcolm Gracie Semple

Background The COVID-19 pandemic created the need for very large scale, rapid testing to prevent and contain transmission of the SARS-CoV-2 virus. Lateral flow device (LFD) immunoassays meet this need by indicating the presence of SARS-CoV-2 antigen from nose/throat swab washings in 30 minutes without laboratory processing, and can be manufactured quickly at low cost. Since March 2021, UK schools have asked pupils without symptoms to test twice weekly. Pupils have posted on social media about using soft drinks to create positive results. The aim of this study was to systematically test a variety soft drinks to determine whether they can cause false false positive LFD results. Methods This study used 14 soft drinks and 4 artificial sweeteners to determine the outcome of misusing them as analyte for the Innova SARS-CoV-2 antigen rapid qualitative LFD. The pH value, sugar content and ingredients of each sample are described. The LFD results were double read and a subset was repeated using the same devices and fake analytes but differently sourced. Findings One sample (1/14; 7%), spring water, produced a negative result. Ten drinks (10/14; 71%) produced a positive or weakly positive result. Three samples (3/14; 21%) produced void results, mostly the fruit concentrate drinks. There was no apparent correlation between the pH value (pH 5.0 in 13/14, 93%; pH 6.5 in 1/14; 7%) or the sugar content (range 0-10.7 grams per 100mls) of the drinks and their LFD result. The 4 artificial sweeteners all produced negative results. A subset of the results was fully replicated with differently sourced materials. Interpretation Several soft drinks can be misused to give false positive SARS-CoV-2 LFD results. Daily LFD testing should be performed first thing in the morning, prior to the consumption of any food or drinks, and supervised where feasible. Funding This work was self-funded by author LO and the LFD were gifted for use in this study.

20: COVID- 19 Infection in Children: Estimating Pediatric Morbidity and Mortality
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Posted 08 May 2020

COVID- 19 Infection in Children: Estimating Pediatric Morbidity and Mortality
1,495 downloads medRxiv pediatrics

Michelle Barton Forbes, Kayur Mehta, Kriti Kumar, Jielin Lu, Nicole Le Saux, Margaret Sampson, Joan Robinson

BACKGROUND: Estimates of pediatric morbidity and mortality from COVID-19 are vital for planning optimal use of human and material resources throughout this pandemic. METHODS: Government websites from countries with minimum 1000 cases in adults and children on April 13, 2020 were searched to find the number of cases confirmed in children, the age range, and the number leading to hospitalization, intensive care unit (ICU) admission or death. A systematic literature search was performed April 13, 2020 to find additional data from cases series. RESULTS: Data on pediatric cases were available from government websites for 23 of the 70 countries with minimum 1000 cases by April 13, 2020. Of 424 978 cases in these 23 countries, 8113 (1.9%) occurred in children. Nine publications provided data from 4251 cases in 4 additional countries. Combining data from the websites and the publications, 330 of 2361 cases required admission (14%). The ICU admission rate was 2.2 % of confirmed cases (44 of 2031) and 7.2% of admitted children (23 of 318). Death was reported for 15 cases. CONCLUSION: Children accounted for 1.9% of confirmed cases. The true incidence of pediatric infection and disease will only be known once testing is expanded to individuals with less severe or no symptoms. Admission rates vary from 0.3 to 10% of confirmed cases (presumably varying with the threshold for testing) with about 7% of admitted children requiring ICU care. Death is rare in middle and high income countries.

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