Pfizer says booster dose safe as vaccine efficacy erodes over time: Pfizer Inc. said that data from the U.S. and Israel suggest that the efficacy of its Covid-19 vaccine wanes over time, and that a booster dose was safe and effective at warding off the virus and new variants. The company detailed the data in a presentation it will deliver to a meeting of outside ...
Wednesday, 15 September 2021
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