Newly released data show that the efficacy of the Pfizer vaccine protecting against symptomatic Covid-19 dropped every two months, to 84% after six months from a peak of 96% within two months of vaccination
Protection against symptomatic Covid-19 from Pfizer Inc. and partner BioNTech SE’s vaccine diminished over time but remained strong after six months, according to data released by the companies Wednesday.
The efficacy of the vaccine protecting against symptomatic disease dropped every two months, to 84% after six months from a peak of 96% within two months of vaccination, a decline that may add urgency to Pfizer’s push to administer an additional dose to maintain protection.preventing symptomatic Covid-19 during the first six monthsPfizer plans to ask U.S.
Some countries have authorized booster shots for immunocompromised patients, but physicians and immunologists in the U.S. say there isn’t a clear answer yet on whether they are needed for the general population.
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