From the Overview: "As of March 4, 2020, the novel coronavirus that began sickening patients in Wuhan, China, in early December 2019 had spread to over 75 countries, including the United States. Daily new cases and deaths related to the virus outside China now exceed those reported in China, where the epidemic appears to be coming under control. The World Health Organization (WHO) has named the new virus 'severe acute respiratory syndrome coronavirus 2' (SARS-CoV-2) and the disease that it causes 'coronavirus disease 2019' (COVID-19). WHO has declared the outbreak a Public Health Emergency of International Concern and raised its global risk assessment to 'Very High.' It has refrained from labeling the outbreak a 'pandemic,' however. Doing so, WHO Director-General Tedros Adhanom Ghebreyesus has said, could 'signal that we can no longer contain the virus, which is not true.' On March 5, Tedros told countries, 'This is not the time to give up.' Rather, 'This is a time for pulling out all the stops.'"
CRS In Focus, IF11421
Congressional Research Service: https://crsreports.congress.gov/