Internationally, 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.

Internationally, 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.