Pfizer sees waning immunity from its Covid-19 vaccine, says developing new booster
CNN
Pfizer said Thursday it is seeing waning immunity from its coronavirus vaccine and says it is picking up its efforts to develop a booster dose that will protect people from variants.
It said it would seek emergency use authorization from the US Food and Drug Administration for a booster dose in August after releasing more data about how well a third booster dose of vaccine works.More Related News