Covid-19 booster shots: What you need to know

The Food and Drug Administration is poised to dramatically expand the use of Covid-19 booster shots as soon as this week, after weeks of public debate over who needs the shots — and when.

POLITICO breaks down the U.S. booster rollout and the big remaining questions, including how long the shots’ protection lasts and whether the Biden administration will authorize “mix and match” boosters.

So, who can get a booster?

FDA has authorized Pfizer’s shot for some groups and is likely to authorize boosters from Moderna and Johnson & Johnson...