Confirmed cases of coronavirus infections in the U.S. neared 3.6 million, as the country posted a single-day record of more than 77,000 new cases on Thursday, while surges elsewhere took the pandemic to new heights around the world.

In some American states, officials continue to clash over requiring residents to wear masks to curb the virus’s spread. Governments elsewhere in the world are struggling with upticks and puzzle over the causes of new infections with unclear sources.

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