Pfizer asks US to allow 4th COVID vaccine dose for seniors

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.