At least 139,175 people have died of COVID-19 in the U.S.: Over 14 million people across the globe have been diagnosed with COVID-19, the disease caused by the new respiratory virus, according to data compiled by the Center for Systems Science and Engineering at Johns Hopkins University. The actual numbers are believed to be much higher due to testing shortages, many unreported cases and suspicions that some governments are hiding or downplaying the scope of their nations' outbreaks. The United States has become the worst-affected country, with more than 3.6 million diagnosed cases and at least 139,175 deaths.