school children are incredibly good at passing a virus along. children naturally exhale more highly concentrated virus droplets than adults do. they also exhale them for longer periods of time. plus children are very active always in each other's faces. and there is a general lack of hygiene -- children don't wash their hands. they don't cover noses or mouths when they sneeze or cough. even more importantly they don't get very sick -- which means they continue to spread the virus while they are very contagious.
why does my child always seem to have a cold?