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 days of free at-home COVID-19 tests may be over, but the virus certainly hasn’t gone away. With symptoms that overlap with the flu (like a runny nose, fatigue, and headache) and the latest highly ...

Swiss drugmaker Roche plans to boost rapid COVID-19 antigen test production to hundreds of millions monthly, including possible saliva tests, Chief Executive Severin Schwan said on Thursday, while ...

Countries straining to contain a second wave of COVID-19 are turning to faster, cheaper but less accurate tests to avoid the delays and shortages that have plagued efforts to diagnose and trace those ...