COVID-19 Transmission and Children: The Child Is Not to Blame - American Academy of Pediatrics

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COVID-19 Transmission and Children:
                             The Child Is Not to Blame
                             Benjamin Lee, MD, William V. Raszka, Jr, MD

Coronavirus disease (COVID-19)                    the child developed symptoms after or
presents arguably the greatest public             concurrent with adult HHCs, suggesting
health crisis in living memory. One               that the child was not the source of
surprising aspect of this pandemic is             infection and that children most
that children appear to be infected by            frequently acquire COVID-19 from adults,
severe acute respiratory syndrome                 rather than transmitting it to them.
coronavirus 2 (SARS-CoV-2), the
virus that causes COVID-19, far less              These findings are consistent with
frequently than adults and, when                  other recently published HHC
infected, typically have mild                     investigations in China. Of 68 children
symptoms,1–3 although emerging                    with confirmed COVID-19 admitted to
reports of a novel Kawasaki                       Qingdao Women’s and Children’s
disease–like multisystem inflammatory              Hospital from January 20 to February
syndrome necessitate continued                    27, 2020, and with complete
                                                                                                   Department of Pediatrics, Larner College of Medicine,
surveillance in pediatric patients.4,5            epidemiological data, 65 (95.59%)                University of Vermont, Burlington, Vermont
However, a major question remains                 patients were HHCs of previously
                                                  infected adults.7 Of 10 children                 Opinions expressed in these commentaries are
unanswered: to what extent are
                                                                                                   those of the authors and not necessarily those of the
children responsible for SARS-CoV-2               hospitalized outside Wuhan, China, in            American Academy of Pediatrics or its Committees.
transmission? Resolving this issue is             only 1 was there possible child to adult
                                                                                                   DOI: https://doi.org/10.1542/peds.2020-004879
central to making informed public                 transmission, based on symptom
                                                  chronology.8 Similarly, transmission of          Accepted for publication Mar 18, 2020
health decisions, ranging from how to
safely re-open schools, child care                SARS-CoV-2 by children outside                   Address correspondence to William V. Raszka, Jr,
                                                                                                   Department of Pediatrics, University of Vermont,
facilities, and summer camps down to              household settings seems uncommon,
                                                                                                   Larner College of Medicine, 89 Beaumont Ave, Given
the precautions needed to obtain                  although information is limited. In an           Courtyard N210, Burlington, VT 05405.
a throat culture in an uncooperative              intriguing study from France, a 9-year-          E-mail: william.raszka@med.uvm.edu
child. To date, few published data are            old boy with respiratory symptoms                PEDIATRICS (ISSN Numbers: Print, 0031-4005; Online,
available to help guide these decisions.          associated with picornavirus, influenza           1098-4275).
                                                  A, and SARS-CoV-2 coinfection was                Copyright © 2020 by the American Academy of
In this issue of Pediatrics, Posfay-Barbe         found to have exposed over 80                    Pediatrics
et al6 report on the dynamics of COVID-           classmates at 3 schools; no secondary            FINANCIAL DISCLOSURE: The authors have indicated
19 within families of children with               contacts became infected, despite                they have no financial relationships relevant to this
reverse-transcription polymerase                  numerous influenza infections within              article to disclose.
chain reaction–confirmed SARS-CoV-2                the schools, suggesting an environment           FUNDING: No external funding.
infection in Geneva, Switzerland. From            conducive to respiratory virus                   POTENTIAL CONFLICT OF INTEREST: The authors have
March 10 to April 10, 2020, all children          transmission.9 In New South Wales,               indicated they have no potential conflicts of interest
,16 years of age diagnosed at Geneva              Australia, 9 students and 9 staff                to disclose.
University Hospital (N = 40) underwent            infected with SARS-CoV-2 across 15               COMPANION PAPER: A companion to this article can
contact tracing to identify infected              schools had close contact with a total of        be found online at www.pediatrics.org/cgi/doi/10.
household contacts (HHCs). Of 39                  735 students and 128 staff.10 Only 2             1542/peds.2020-1576.
evaluable households, in only 3 (8%)              secondary infections were identified,
was a child the suspected index case,             none in adult staff; 1 student in                  To cite: Lee B and Raszka WV. COVID-19
                                                                                                     Transmission and Children: The Child Is Not to
with symptom onset preceding illness              primary school was potentially infected
                                                                                                     Blame. Pediatrics. 2020;146(2):e2020004879
in adult HHCs. In all other households,           by a staff member, and 1 student in high

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PEDIATRICS Volume 146, number 2, August 2020:e2020004879                                                                              COMMENTARY
school was potentially infected via         infected in the community and                        SARS-CoV-2 epidemic: an observational
exposure to 2 infected schoolmates.         present as index cases.                              cohort study [published online ahead of
                                                                                                 print May 13, 2020]. Lancet. 2020. doi:
                                            Almost 6 months into the pandemic,                   10.1016/S0140-6736(20)31103-X
On the basis of these data, SARS-CoV-
                                            accumulating evidence and collective
2 transmission in schools may be less                                                         6. Posfay-Barbe K, Wagner N, Gauthey M,
                                            experience argue that children,
important in community transmission                                                              et al. COVID-19 in children and the
                                            particularly school-aged children, are
than initially feared. This would be                                                             dynamics of infection in families.
                                            far less important drivers of SARS-                  Pediatrics. 2020;146(2):e20201576
another manner by which SARS-CoV-
                                            CoV-2 transmission than adults.
2 differs drastically from influenza,                                                          7. Wu Q, Xing Y, Shi L, et al. Co-infection
                                            Therefore, serious consideration
for which school-based transmission                                                              and other clinical characteristics of
                                            should be paid toward strategies that
is well recognized as a significant                                                               COVID-19 in children. Pediatrics. 2020;
                                            allow schools to remain open, even
driver of epidemic disease and forms                                                             146(1):e20200961
                                            during periods of COVID-19 spread.
the basis for most evidence regarding                                                         8. Cai J, Xu J, Lin D, et al. A case series of
                                            In doing so, we could minimize the
school closures as public health                                                                 children with 2019 novel coronavirus
                                            potentially profound adverse social,
strategy.11,12 Although 2 reports are                                                            infection: clinical and epidemiological
                                            developmental, and health costs that
far from definitive, the researchers                                                              features [published online ahead of
                                            our children will continue to suffer until           print February 28, 2020]. Clin Infect Dis.
provide early reassurance that
                                            an effective treatment or vaccine can be             2020. doi:10.1093/cid/ciaa198
school-based transmission could be
                                            developed and distributed or, failing
a manageable problem, and school                                                              9. Danis K, Epaulard O, Bénet T, et al;
                                            that, until we reach herd immunity.16,17
closures may not have to be                                                                      Investigation Team. Cluster of coronavirus
a foregone conclusion, particularly for                                                          disease 2019 (Covid-19) in the French
elementary school–aged children who                                                              Alps, February 2020 [published online
                                              ABBREVIATIONS                                      ahead of print April 11, 2020]. Clin Infect
appear to be at the lowest risk of
                                             COVID-19: coronavirus disease                       Dis. 2020. doi:10.1093/cid/ciaa424
infection. Additional support comes
from mathematical models, which              HHC: household contact                          10. National Centre for Immunisation Research
find that school closures alone may be        SARS-CoV-2: severe acute                            and Surveillance. COVID-19 in Schools - The
                                                         respiratory                             Experience in NSW. New South Wales,
insufficient to halt epidemic spread13
                                                         syndrome                                Australia: National Centre for Immunisation
and have modest overall impacts
                                                         coronavirus 2                           Research and Surveillance; 2020
compared with broader, community-
wide physical distancing measures.14                                                         11. Cauchemez S, Valleron A, Boëlle P,
                                                                                                 Flahault A, Ferguson N. Estimating the
These data all suggest that children                                                             impact of school closure on influenza
                                            REFERENCES                                           transmission from Sentinel data.
are not significant drivers of the
                                              1. CDC COVID-19 Response Team.                     Nature. 2008;452(7188):750–754
COVID-19 pandemic. It is unclear
                                                 Coronavirus disease 2019 in children -      12. Litvinova M, Liu Q, Kulikov E, Ajelli M.
why documented SARS-CoV-2
                                                 United States, February 12–April 2,             Reactive school closure weakens the
transmission from children to other              2020. MMWR Morb Mortal Wkly Rep.                network of social interactions and
children or adults is so infrequent. In          2020;69(14):422–426                             reduces the spread of influenza. Proc Natl
47 COVID-19–infected German
                                              2. Dong Y, Mo X, Hu Y, et al. Epidemiology         Acad Sci USA. 2019;116(27):13174–13181
children, nasopharyngeal SARS-CoV-2
                                                 of COVID-19 among children in China.        13. Zhang J, Litvinova M, Liang Y, et al. Changes
viral loads were similar to those in             Pediatrics. 2020;145(6):20200702e               in contact patterns shape the dynamics of
other age groups, raising concern that
                                              3. Wu Z, McGoogan JM. Characteristics of           the COVID-19 outbreak in China [published
children could be as infectious as
                                                 and important lessons from the                  online ahead of print April 29, 2020].
adults.15 Because SARS-CoV-2                                                                     Science. 2020. doi:10.1126/science.abb8001
                                                 coronavirus disease 2019 (COVID-19)
infected children are so frequently              outbreak in China: summary of a report      14. Ferguson N, Laydon D, Nedjati-Gilani G, et al.
mildly symptomatic, they may have                of 72 314 cases from the Chinese Center         Impact of Non-Pharmaceutical Interventions
weaker and less frequent cough,                  for Disease Control and Prevention.             (NPIs) to Reduce COVID-19 Mortality and
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into the surrounding environment.             4. Riphagen S, Gomez X, Gonzalez-Martinez          Kingdom: Imperial College London; 2020
Another possibility is that because              C, Wilkinson N, Theocharis P.               15. Jones TC, Muhlemann B, Veith T, et al. An
school closures occurred in most                 Hyperinflammatory shock in children              analysis of SARS-CoV-2 viral load by
locations along with or before                   during COVID-19 pandemic. Lancet.               patient age. Research network zoonotic
widespread physical distancing                   2020;395(10237):1607–1608                       infectious diseases. 2020. Available at:
orders, most close contacts became            5. Verdoni L, Mazza A, Gervasoni A, et al.         https://zoonosen.charite.de/fileadmin/
limited to households, reducing                  An outbreak of severe Kawasaki-like             user_upload/microsites/m_cc05/
opportunities for children to become             disease at the Italian epicentre of the         virologie-ccm/dateien_upload/Weitere_

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2                                                                                                                             LEE and RASZKA
Dateien/analysis-of-SARS-CoV-2-viral-load-       May 13, 2020]. JAMA Pediatr. 2020. doi:          effective intervention at the global
    by-patient-age.pdf. Accessed April 30, 2020      10.1001/jamapediatrics.2020.2068                 level? [published online ahead of
 16. Christakis D. School reopening-the           17. Esposito S, Principi N. School closure          print May 13, 2020]. JAMA Pediatr.
     pandemic issue that is not getting its           during the coronavirus disease                  2020. doi:10.1001/jamapediatrics.2020.
     due [published online ahead of print             2019 (COVID-19) pandemic: an                    1892

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PEDIATRICS Volume 146, number 2, August 2020                                                                                                   3
COVID-19 Transmission and Children: The Child Is Not to Blame
                    Benjamin Lee and William V. Raszka Jr
                            Pediatrics 2020;146;
    DOI: 10.1542/peds.2020-004879 originally published online May 26, 2020;

Updated Information &         including high resolution figures, can be found at:
Services                      http://pediatrics.aappublications.org/content/146/2/e2020004879
References                    This article cites 14 articles, 5 of which you can access for free at:
                              http://pediatrics.aappublications.org/content/146/2/e2020004879#BI
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COVID-19 Transmission and Children: The Child Is Not to Blame
                   Benjamin Lee and William V. Raszka Jr
                           Pediatrics 2020;146;
   DOI: 10.1542/peds.2020-004879 originally published online May 26, 2020;

The online version of this article, along with updated information and services, is
                        located on the World Wide Web at:
        http://pediatrics.aappublications.org/content/146/2/e2020004879

Pediatrics is the official journal of the American Academy of Pediatrics. A monthly publication, it
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the American Academy of Pediatrics, 345 Park Avenue, Itasca, Illinois, 60143. Copyright © 2020
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