covid vaccine boosters

Millions more Americans can get a COVID-19 booster and choose a different company’s vaccine for that next shot, federal health officials said Thursday. Certain people who received Pfizer vaccinations months ago already are…

Billions more in profits are at stake for some vaccine makers as the U.S. moves toward dispensing COVID-19 booster shots to shore up Americans’ protection against the virus. How much the manufacturers stand to gain depends on…

The idea of waning immunity has picked up steam in recent weeks, with some countries using it to justify rolling out third-dose COVID-19 vaccine boosters to their populations. But immunologists say the concept has been largely…