Pfizer claims 3rd vaccine dose can boost protection against Delta variant up to 11 times

The U.S. drugmaker said it may apply for emergency use authorization for a potential booster shot starting in August.

RIO DE JANEIRO, BRAZIL - A third dose of the Pfizer/BioNTech Covid-19 vaccine may "strongly" boost protection against the Delta variant of the coronavirus, suggest new data released Wednesday (28) by the drugmaker which also announced that it may apply for emergency use authorization for a booster shot starting in August.

The data posted online suggest that antibody levels against the Delta variant in people ages 18 to 55 who receive a third dose of vaccine are 5 times greater than those levels following a second dose.

Among people ages 65 to 85, the Pfizer data suggest that antibody . . .

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