Pfizer will test a booster shot and develop an adapted vaccine to address variant concerns.
Pfizer and BioNTech believe their existing vaccine still offers good protection against circulating variants, and see the plan as a way of learning how to deal with a more threatening mutation.
from NYT > World News https://ift.tt/2ZR0opV
from NYT > World News https://ift.tt/2ZR0opV
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