https://ift.tt/2wwdHAe The U.S. will buy 200 million more Moderna doses, in case Covid vaccine boosters are needed. internal-essential, Vaccination and Immunization, Coronavirus (2019-nCoV) The purchase, with the option to include any developed to fight variants as well as pediatric doses, gives the administration the flexibility to administer booster shots if they prove necessary. BY SHERYL GAY STOLBERG https://ift.tt/3cMYRrR June 17, 2021 at 01:01AM