AdvertisementThis Coronavirus Doesn't Change Quickly, And That's Good News For Vaccine MakersJune 26, 2020Jon HamiltonfacebookEmailInternationally, scientists now have on file the genomes of more than 47,000 different samples of the virus that causes COVID-19 — up from just one in January. Here's a transmission electron micrograph of SARS-CoV-2 virus particles (orange) isolated from a patient. (National Institute of Allergy and Infectious Diseases/National Institutes of Health)