Coronavirus: 9 in 10 dying have existing illness April 16, 2020 Heart disease is the most common underlying condition, followed by dementia and respiratory illness. Source: Coronavirus: 9 in 10 dying have existing illness Updated: April 16, 2020 at 9:08 am ◀ Trump’s big show of opening the economy will hide the real story U.S. Marines deploys to support FEMA in U.S. ▶