The purpose of this study is to determine how many children with and without known COVID-19 infections have made an immune response (blood antibodies) over time. We will also do more extensive testing of the immune system on a smaller group of children.

This study has been approved by the University of Calgary's Conjoint Health Research Ethics Board (CHREB). Ethics ID: REB20-0480

Cette étude a été approuvée par le Comité conjoint d'éthique de la recherche en santé de l'Université de Calgary, Ethics ID: REB20-0480