In the quest to stop COVID-19, the most critical question yet may be how SARS-CoV-2 causes illness.

When does a cancer first arise? For some patients, the answer can be decades before it is first diagnosed.

Scores of COVID-19 test kits have been developed since the pandemic began, but which are the most accurate?

First-time analyses of glaucoma across multiple ancestries find new genetic variants that may lead to new treatment targets.