HealthCareTips blog: Pfizer sees waning immunity from its Covid-19 vaccine, says developing new booster; Pfizer 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.

Pfizer sees waning immunity from its Covid-19 vaccine, says developing new booster; Pfizer 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.

Pfizer sees waning immunity from its Covid-19 vaccine, says developing new booster; Pfizer 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.

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