Authorization for a third dose for immunocompromised patients may have been an initial step toward booster shots of the COVID-19 vaccines, but Pfizer Inc./BioNTech SE have taken a bigger step in submitting the first clinical trial data to the US Food and Drug Administration for approval of a third shot of BNT162b2.
The companies said 16 August that they submitted Phase I safety and immunogenicity data for a third, 30mcg shot of BNT162b2. Data showed that the booster shot, given eight to nine months after the second dose, elicited significantly higher neutralizing antibodies against the wild-type, Beta and Delta strains of the virus than the standard two-dose series
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