Researchers found that the vaccine’s effectiveness dropped to 12 percent from 68 percent amid the omicron surge.
still offered protection against serious illness from Covid, the researchers found, with protection against hospitalization declining to 48 percent from 100 percent over the same time period.
The New York state researchers, who also examined vaccine data in children ages 12 to 17, found the shots performed better in older children, who are given a higher dosage. It’s unclear if Pfizer will seek FDA authorization of a booster dose for kids 5 to 11. The company told NBC News in a statement that it is confident in the protection and safety of its Covid vaccine, though early data suggests people vaccinated with three doses may have a higher degree of protection.
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