https://apnews.com/bcd720bea25d0f90fac6b56c39b07100

Many Americans now can get a second COVID-19 booster, but it’s hard to tell who really needs another shot right now and who could wait.

The Food and Drug Administration authorized extra Pfizer or Moderna shots for anyone 50 or older and for some younger people with severely weakened immune systems. It's an effort to get ahead of a possible next coronavirus surge.