The Lancet: COVID-19 in children and adolescents in Europe: a multinational, multicentre cohort study

Findings
582 individuals with PCR-confirmed SARS-CoV-2 infection were included, with a median age of 5·0 years (IQR 0·5–12·0) and a sex ratio of 1·15 males per female. 145 (25%) had pre-existing medical conditions. 363 (62%) individuals were admitted to hospital. 48 (8%) individuals required ICU admission, 25 (4%) mechanical ventilation (median duration 7 days, IQR 2–11, range 1–34)...

https://www.thelancet.com/journals/lanchi/article/PIIS2352-4642(20)30177-2/fulltext