Booster shots against the coronavirus have already started rolling out in the U.S. for some people and millions more could be due for them soon. But as
Worries about waning immunity and talk of COVID booster shots has some Americans checking their antibody levels to see if they're protected. But scientists warn blood tests don't tell the full story.
Booster shots against the coronavirus have already started rolling out in the U.S. for some people and millions more could be due for them soon. But as
Booster shots against the coronavirus have already started rolling out in the U.S. for some people and millions more could be due for them soon. But as