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SARS-CoV-2 tests, confirmed infections and COVID-19-related..:

Hardelid, Pia ; Favarato, Graziella ; Wijlaars, Linda...
https://discovery.ucl.ac.uk/id/eprint/10155071/1/Hardelid_SARS-CoV-2%20tests,%20confirmed%20infections%20and%20COVID-19-related%20hospital%20admissions%20in%20children%20and%20young%20people_VoR.pdf.  , 2022