From the Introduction: "Coronavirus Disease 2019 (COVID-19) is caused by a novel virus: the Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2). In March 2020, the World Health Organization (WHO) characterized it as a pandemic; the disease has reportedly spread to more than 180 countries. The origin of the COVID-19 outbreak is not certain, though several studies have identified high genetic similarity between SARS-CoV-2 and coronaviruses found in bat species that are sold in some 'wet markets' (markets that sell live animals and perishable goods) in China. SARS-CoV-2, like most coronaviruses, is zoonotic, meaning it is derived from viruses, bacteria, and other pathogens that are transmitted between animals and humans."
CRS In Focus, IF11494
Congressional Research Service: https://crsreports.congress.gov/