We read with great interest the study by Mantovani et al. (Vol. 89, issue 4)1. The authors aimed to assess the overall prevalence of clinical signs, symptoms and radiological findings in children and/or adolescents with COVID-19. We want to congratulate the authors for establishing a timely and informative systematic review of COVID-19 in children. Certainly, the findings of Mantovani et al. hold significance for pediatricians. However, we would like to draw their attention to the following issues.

First, according to the exclusion criteria, the authors stated that ‘papers in non-English language were excluded’. However, the references 21, 27 and 28 included in this study were all published in Chinese.

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