An advisory committee to the CDC has endorsed updated versions of the Moderna and Pfizer-BioNTech vaccines that target the original coronavirus and two omicron subvariants.
Vials of the reformulated Pfizer-BioNTech COVID-19 booster move through production at a plant in Kalamazoo, Mich. Earlier in the day vaccine advisers to the Centers for Disease Control and Prevention voted to recommend reformulated versions of the Moderna and Pfizer-BioNTech COVID-19 vaccines. The vote was 13 in favor and one no vote.
The booster shots target both the original strain of the coronavirus and the omicron BA.4 and BA.5 subvariants that most people are catching now. This double-barreled vaccine is called a bivalent vaccine. This is the first time the FDA has authorized COVID vaccines without requiring they get tested in people. To keep up with the rapidly evolving virus, the FDA relied on how well the shots stimulated the immune systems of mice. They also looked at how well similar shots targeted at earlier variants worked on people.
But other advisers were more comfortable, pointing out that flu vaccines are updated every year without being tested in people.of Cayuga Family Medicine."We're going to have more variants and we should be treating this like the flu, where we can use new strain variants every year." Loehr says he's comfortable recommending the updated boosters,"even if we don't have human data.
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