Could the common cold give children immunity against COVID? Our research offers clues

Why children are less likely to become severely ill with COVID compared with adults is not clear. Some have suggested that it might be because children are less likely to have diseases, such as type 2 diabetes and high blood pressure, that are known to be linked to more severe COVID. Others have suggested that it could be because of a difference in ACE2 receptors in children—ACE2 receptors being the route through which the virus enters our cells.