Prognosis

U.S. Cases Increase 0.9%; California, Arizona Slow: Virus Update

A person wearing a protective mask gets a Covid-19 swab test at a testing site in San Francisco, California, U.S., on July 30.

Photographer: David Paul Morris/Bloomberg
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California and Arizona reported positive trends on new cases after battling a surge in infections last month. New Jersey, concerned about recent violations of social-distancing rules among young revelers, reduced crowd limits for indoor parties.