Children make up 20% of all new COVID-19 cases in the U.S. with spikes in Colorado and Michigan as experts blame variants, lack of a vaccine for kids and loosened restrictions - but 0.01% of under-18s die A near-record 22.4% of new Covid infections last week were among children under 18, a recent report finds More than a 20 percent of people newly infected with coronavirus last week in Colorado were children, state data reveal But fewer than 500 children who have had COVID-19 in the U.S. have died of the infection, CDC data shows Over the course of the entire pandemic, children between 0 and 19 have made up nearly 17 percent of all COVID-19 cases in the state but have risen