Drugmaker Pfizer is expected to request authorization this week for an additional COVID booster dose for those over 65, which would add a fourth dose to the regimen in an effort to provide maximum protection to a population hit hardest by the pandemic
Pfizer and its partner BioNTech asked U.S. regulators Tuesday to authorize an additional booster dose of their COVID-19 vaccine for seniors, saying data from Israel suggests older adults would benefit.
Currently the U.S. urges two primary shots followed months later by a booster dose for everyone age 12 and older. The new application seeks to add a fourth shot only for the over-65 population that has been hit hardest by the pandemic. The Food and Drug Administration and the Centers for Disease Control would have to approve the request. If so, a key question would be how soon seniors would be advised to roll up their sleeves.
While authorities say the vaccinations continue to offer strong protection against severe illness, they haven't held up as well against milder infections especially those due to the omicron mutant.
The U.S. booster campaign was based on evidence that the shots’ effectiveness, particularly against milder infections, was waning about six months after the last dose. Calls for a third shot grew once it became clear the vaccines weren’t as strong against the omicron mutant as they were against earlier versions of the virus.
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