Ducharme is a contributor to TIME. Technician preparing human medical samples for screening in the lab. Ducharme is a contributor to TIME. How much protection do you currently have against COVID-19?

Illustration of antibodies (red and blue) responding to an infection with the new coronavirus SARS-CoV-2 (purple). The virus emerged in Wuhan, China, in December 2019, and causes a mild respiratory ...

A newly developed blood test that measures a specific immune response in the body could help doctors gauge how much protection a person has against Covid-19, according to a new study. Subscribe to ...

COVID-19 certainly didn't take a vacation this summer. Virus levels in the US have been on the rise for weeks, but it's hard to know exactly how widely it's spreading. Federal data suggests that the ...