Taking a COVID-19 test at home seems simple enough: If you get a line, you're positive for the coronavirus. But what if your results aren't so obvious? For instance, if you only get a very faint line ...

The FDA has issued emergency authorizations to 12 antibody tests for the virus. As federal officials gradually begin reopening the country, expanded testing is central to the conversation. Until now, ...

Over 3.1 million children have tested positive for the coronavirus. Though Dr. Anthony Fauci, the White House chief medical adviser, predicted a COVID-19 vaccine may not be available for high ...

Confirmed COVID-19 cases are again up week-over-week, according to CDC data. Here's what to know the week of Sept. 1.