It’s Booster Time—Again

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Two new Covid-19 booster vaccines are now available, from Moderna and Pfizer-BioNTech (“Pfizer”). Here are some key points about them—including their safety, effectiveness, and who should get them and when—from Dr. John Swartzberg, chair of the Wellness Letter editorial board: Their composition Both the Moderna and Pfizer boosters, like their predecessors, are mRNA vaccines (which […]