With three coronavirus vaccines already approved for emergency use authorization in the U.S., how do the different available shots compare? Pfizer and Moderna's COVID vaccines have been available in ...
LOS ANGELES -- The COVID-19 vaccines made by Pfizer and Moderna both require two doses to be administered, several weeks apart, for them to be fully effective. But there has been some scientific ...
Amid uncertainty over how the Trump administration would approach mRNA COVID-19 vaccines for the upcoming respiratory virus season, the FDA has approved updated shots from Pfizer and Moderna. But ...
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