Age and the presence of comorbid illnesses increase the risk for death among persons with COVID-19 (11, 12). The clinical manifestations of COVID-19 in children are less severe compared with adults, yet age younger than 1 year seems to increase the risk for critical illness (13). Current case-fatality rate estimates range from 0.6% to 7.2% by region and seem to be substantially higher than the 0.1% mortality rate of seasonal influenza (12, 14, 15). However, current estimates of COVID-19 case-fatality rates are probably inflated because of preferential testing in many countries of persons with severe manifestations, who are at risk for death (12, 16). In Germany and South Korea, the case-fatality rates are less than 0.5%, probably because extensive testing revealed a large denominator of mild illness (17).