Covid-19 infections are accelerating in Sun Belt nursing homes, federal data show, a sign the coronavirus is reaching the most vulnerable people there.

So far, emerging outbreaks of Covid-19 in Tampa, Fla., Phoenix, Houston and elsewhere in the South have been less deadly than the initial U.S. wave that emerged in March and April. One reason experts cite: Victims in states that raced to reopen bars, restaurants and churches after the initial lockdown tend to be younger and better able to fight off the virus.

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