The total, estimated by researchers at the University of Washington, is 57% higher than the official death toll. Worldwide, they said, COVID-19 deaths are nearing 7 million, twice the official total.
A pair of reports published by the U.S. Centers for Disease Control and Prevention on Wednesday sheds new light on the approximately 375,000 deaths attributed to COVID-19 in the U.S. last year.
More hospitalized patients are surviving than early in the pandemic. Improved treatments make a big difference, but so does flattening the curve to keep hospitals from overfilling, researchers say.