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Pfizer will test a booster shot and develop an adapted vaccine to address variant concerns.

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By BY KATIE THOMAS from NYT World https://ift.tt/3dOEITI
Pfizer will test a booster shot and develop an adapted vaccine to address variant concerns. Pfizer will test a booster shot and develop an adapted vaccine to address variant concerns. Reviewed by Anonymous on February 25, 2021 Rating: 5
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