Children were less frequently infected with SARS-CoV-2 than adults during 2020 COVID-19 pandemic in Warsaw, Poland

Ernest Kuchar, Andrzej Załęski, Michał Wronowski, Dagny Krankowska, Edyta Podsiadły, Klaudia Brodaczewska, Aneta Lewicka, Sławomir Lewicki, Claudine Kieda, Andrzej Horban, Małgorzata Kloc, Jacek Z. Kubiak

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Clinical data suggest that during the current COVID-19 pandemic, children are less prone than adults to SARS-CoV-2 infection. Our purpose was to determine the frequency of SARS-CoV-2 in children vs. adults during the 2020 pandemic in Warsaw, Poland, and to investigate whether RSV and/or influenza A/B infections were associated with SARS-CoV-2 infections. We present results of RT-PCR tests for SARS-CoV-2 performed in Warsaw, Poland. Some of the pediatric subjects were also PCR-tested for RSV, and A and B influenza. We compared the test results from the four groups of symptomatic and asymptomatic subjects: 459 symptomatic pediatric patients (children 0–18 years old), 1774 symptomatic adults, 445 asymptomatic children, and 239 asymptomatic adults. 3.26% (15/459) of symptomatic pediatric patients were positive for SARS-CoV-2 in contrast to 5.58% (99/1774) of symptomatic adults (p = 0.0448). There were no SARS-CoV-2 positive cases in the group of asymptomatic children (0/445) and two positive cases in the group of asymptomatic adults (2/239), i.e., 0.83%. In the group of symptomatic pediatric patients, 17.14% (6/35) (p = 0.0002) were positive for RSV, 8.16% (4/49) were positive for influenza A, and 2.04% (1/49), thus 10.20% (5/49) (p = 0.0176) for influenza A/B. Children were less prone to SARS-CoV-2 infection than the adults during the COVID-19 pandemic in Warsaw. Higher percentage of symptomatic children was infected with RSV or influenza A/B than with SARS-CoV-2. This suggests a necessity for the testing for all these viruses for an early identification and isolation of SARS-CoV-2-positive patients for an ensuing 2020 autumn return of COVID-19.

Original languageEnglish (US)
Pages (from-to)541-547
Number of pages7
JournalEuropean Journal of Clinical Microbiology and Infectious Diseases
Issue number3
StatePublished - Mar 2021


  • 2020 pandemic
  • COVID-19
  • Pediatric patients
  • SARS-CoV-2

ASJC Scopus subject areas

  • Microbiology (medical)
  • Infectious Diseases


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