Nation The delta variant of COVID-19 is more contagious for children. Is it making them sicker, too? August 12, 2021Karen Weintraub and Adrianna Rodriguez, USA TODAYComments Off on The delta variant of COVID-19 is more contagious for children. Is it making them sicker, too? Although there is some evidence to suggest the delta variant of COVID-19 is more virulent in kids, it's not conclusive, experts told USA TODAY.