From the Overview: "Severe acute respiratory syndrome coronavirus 2 (SARSCoV-2) is believed to have emerged in Wuhan, China, in late 2019, and it has since spread around the globe. Confirmed cases of Coronavirus Disease 2019 (COVID-19) are most numerous in the United States, Russia, and Brazil (Figure 1). As of June 11, 2020, the World Health Organization (WHO) estimated that over 7.4 million people had contracted COVID-19 worldwide, and that over 400,000 people had died from it. WHO declared the outbreak a Public Health Emergency of International Concern (PHEIC) on January 30 and labeled it a 'pandemic' on March 11."
CRS In Focus, IF11421
Congressional Research Service: https://crsreports.congress.gov/