Drugstore chains Walgreens Boots Alliance and Rite Aid said on Wednesday they would start offering second booster doses of mRNA COVID-19 vaccines, after the shots were cleared in the United States.
U.S. health officials on Tuesday authorized second booster shots of Pfizer and Moderna’s vaccines for people aged 50 and older, citing data showing waning immunity and the risks posed by Omicron variants of the virus.
