Booster shots of the Pfizer-BioNTech and Moderna vaccines lose substantial effectiveness after about four months, and data suggested that additional boosters may be needed.
The president’s remarks come after an increasing number of Democratic-led states loosen face covering requirements as the omicron-driven coronavirus surge relents.
The recent announcements from states underscore a transition to a “stage where we’re allowing people to make more individual choices,” one public health expert said.