Patient Doreen Mount is comforted by a radiologist in the X-ray department at the Royal Blackburn Teaching Hospital in Blackburn, Britain, May 14, 2020. Hannah McKay/Reuters The CDC's weekly report on US COVID-19 deaths breaks down fatalities by age, sex, race, and comorbidities — health conditions that increase a person's risk of a severe case. Because only 6% of Americans who died of COVID-19 had no preexisting conditions, some people think those are the only people who the virus has truly killed.