vaccine booster
The immunologist stressed that unvaccinated Americans remain by far the most vulnerable to severe illness and death linked to the coronavirus.
Pfizer is submitting early results of a booster study in 10,000 people to make its case that it’s time to further expand the booster campaign.
The Senate GOP leader cited "mountains of evidence" showing coronavirus vaccines are safe and effective.
A booster shot is not necessary "at this time," Dr. Anthony Fauci said.
