Pfizer is about to seek U.S. authorization for a third COVID-19 vaccine shot that would dramatically boost immunity and may help fight off the delta variant.
Pfizer is about to seek U.S. authorization for a third COVID-19 vaccine shot that would dramatically boost immunity and may help fight off the delta variant.
Virginia health officials said new data released by Pfizer showing that a third dose of the vaccine could strongly boost protection..
WBZ TV's Paula Ebben reports.