Coronavirus This scanning electron microscope image shows SARS-CoV-2 (orange)—also known as 2019-nCoV, the virus that causes COVID-19—isolated from a patient in the U.S., emerging from the surface of cells (green) cultured in the lab. SHARE: Download: Full Size (1.45 MB) Credit: Photo courtesy the National Institute of Allergy and Infectious Diseases VIRIN: 200309-O-ZZ999-004M.JPG Photo Gallery