Moderna Begins Testing Its Covid Vaccine in Babies and Young Children. March 16, 2021 IFTTT +4 including infants as young as six months and those under 12 in the United States and Canada. NYT NYT > Business NYTimes The company will study its vaccine in children IFTTT including infants as young as six months and those under 12 in the United States and Canada. NYT NYT > Business NYTimes The company will study its vaccine in children