The number of confirmed U.S. deaths due to the coronavirus is substantially lower than the true tally, according to a study published Wednesday in JAMA Internal Medicine.
Using National Center for Health Statistics data, researchers at Yale University compared the number of excess U.S. deaths from any causes with the reported number of weekly U.S. Covid-19 deaths from March 1 through May 30. The numbers were then compared with deaths from the same period in previous years.
Researchers found that the excess number of deaths over normal levels also exceeded those attributed to Covid-19, leading them to conclude that many of those fatalities were likely caused by the coronavirus but not confirmed. State reporting discrepancies and a sharp increase in U.S. deaths amid a pandemic suggest the number of Covid-19 fatalities is undercounted, they said.