This week, Pfizer and Moderna asked the FDA to authorize fourth doses of their vaccines. Meanwhile, a new study shows protection from one J&J shot lasts at least six months.
The study aligns with data from the Centers for Disease Control and Prevention showing that from late December through Feb. 19 , thewas lowest among people who got the J&J shot. The rate of Covid deaths among J&J recipients, however, was a bit higher than among those who got mRNA vaccines through Jan. 29.
"We also are not saying it’s limited to 180 days," he said, noting that was just the data available, which came from insurance claims. "The mRNA vaccines raise antibody responses very high very quickly, and then those antibody responses and protection decline quickly, necessitating multiple rounds of boosting," said Barouch, who helped develop and study the J&J vaccine."The J&J vaccine raises antibody responses that are much lower initially and protection that is slightly lower initially, but both of those appear to be more maintained over time.
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