The Centers for Disease Control and Prevention told states Tuesday to include probable COVID-19 cases in their reports to the agency. Previously, most states reported only lab-confirmed cases and deaths.
CDC officials said Wednesday in a statement that the change would give them "a better picture of the burden of COVID-19 in the U.S.”
There was already a big rise in New York City, where officials this week started counting people who had never tested positive for the coronavirus. That caused the city's death count to jump by more than 3,700 on Tuesday.
States can report such illnesses how they want, but the CDC provides guidance. The federal agency often relies on an organization called the Council of State and Territorial Epidemiologists to help define cases.
Earlier this month, the council revised its COVID-19 definition to include illnesses that don't have positive test results but in which the evidence points to the disease. The council made the change in part because of growing evidence that some infected people don't exhibit symptoms and may not have been tested.
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