Support WBURModerna asks FDA to authorize first COVID-19 vaccine for very young childrenPlay04:14Download AudioRob SteinApril 28, 2022 ShareModerna says its vaccine appears to be about 51 percent effective for children ages 6 months to less than 2 years, and 37 percent effective for those ages 2 to less than 6 years. (dpa picture alliance via Getty Images)
