The Omicron variant is evolving in ways that make it better able to evade the body’s immune defenses. But booster shots still help prevent severe illness.
Why Biden’s Second Booster Wasn’t Enough to Prevent Infection
Jul 21, 2022
The Omicron variant is evolving in ways that make it better able to evade the body’s immune defenses. But booster shots still help prevent severe illness.