CVS Pharmacy and Walgreens are both now administering COVID-19 booster shots, but only for those with weakened immune systems. It comes after the Food and Drug Administration ruled that transplant ...

LOS ANGELES - The U.S. Food and Drug Administration has authorized an additional COVID-19 booster vaccine for people who have compromised immune systems as the highly contagious delta variant ...

The U.S. will likely start to widely distribute Pfizer Covid-19 booster shots during the week of Sept. 20, but the rollout for Moderna's vaccine could be delayed, White House chief medical advisor Dr.

Moderna announced Monday that a third dose of its mRNA vaccine against Covid-19 appears to provide significant protection against the omicron variant. The company said that its authorized booster can ...