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US Department of Health did not support booster vaccination with Pfizer drug

The Comirnaty vaccine's diminished effectiveness against the Delta strain has not yet been proven.

The U.S. Department of Health and Human Services' Food and Drug Administration has rejected a request for a mass booster dose of the COVID vaccine Comirnaty, developed by U.S. and German pharmaceutical companies Pfizer and BioNTech. This was reported by Reuters on Friday, September 17.

The request, which was submitted by Pfizer and BioNTech, was opposed by an overwhelming majority of specialists who are members of the board.

The report said the Comirnaty vaccine's reduced effectiveness against the Delta strain has yet to be proven.

"Some studies show that efficacy decreases and others show that it does not. Overall, the results suggest that coronavirus vaccines validated in the United States are quite effective in protecting against severe disease or death," the agency explained.

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