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KANSAS CITY, Mo. — The number of new coronavirus cases is increasing in every state, setting off a growing sense of concern from health officials who are warning that the pandemic in the United States is far from over, even though the national outlook is far better than during previous upticks.

The 160 million people across the country who are fully vaccinated are largely protected from the virus, including the highly contagious Delta variant, scientists say. In the Upper Midwest, the Northeast and on the West Coast — including in Chicago, Boston and San Francisco — coronavirus infections remain relatively low.