New images from the CDC show the SARS-CoV2 coronavirus in samples taken from the first American case of COVID-19. Coronavirus particles are artificially colored in blue. We’ve all seen pictures ...

Before the COVID-19 pandemic, these were just a series of arbitrary letters and numbers. Now, we understand these as 'variants of concern,' versions of the SARS-CoV-2 virus with unique genetic codes.

Early in the beginning of the COVID-19 pandemic, scientists predicted the SARS-CoV-2 virus would mutate slowly. They were wrong. Hundreds of thousands of viral mutations and multiple seasonal ...

This image from a scanning electron microscope shows, in orange, the coronavirus that causes the disease COVID-19. The virus was isolated from a patient in the U.S. and is seen here emerging from ...

This is no easy task, because the coronavirus’s strand of genes is a hundred times longer than the virus itself. Recent experiments suggest that, once again, SARS-CoV-2 uses lava-lamp physics to ...

U.S. Covid-19 cases, hospitalizations and deaths have all sharply dropped. Vaccination campaigns are getting more shots into people’s arms. But that hard-won progress remains fragile.