As U.S. Reaches 250,000 Deaths From COVID-19, A Long Winter Is Coming

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A sign on a San Francisco bus advises that passengers are required to wear masks. Health officials have renewed pleas for Americans to protect themselves and others from the coronavirus as the death toll passes 250,000.

Medical advances have reduced the infection fatality rate in the U.S. But experts warn that indoor gatherings, cold temperatures and pandemic fatigue augur dark months ahead.

(Image credit: Jeff Chiu/AP)