COVID-19’s danger lay in its invisibility. The SARS-CoV-2 virus is highly contagious and can be passed on by people with light or no symptoms, making it extremely difficult to track and contain. But ...

If you had COVID-19 symptoms in 2020, you probably would have masked up and braved a visit to a laboratory, doctor’s office, or clinic to get a polymerase chain reaction (PCR) test. A health care ...

Researchers often call the polymerase chain reaction test – known as the PCR test – "the gold standard" for detecting the COVID-19 virus. The test is considered highly reliable and effective, and it ...

The COVID-19 pandemic yielded important advances in testing for respiratory viruses, but it also exposed important unmet needs in screening to prevent the spread of infections in high-risk settings.

BEIJING, April 25 (Reuters) - China's foreign ministry said on Tuesday that all inbound travellers will only need to show COVID-19 antigen tests result taken within 48 hours before boarding flights ...

Over the past four years, many of us have become accustomed to a swab up the nose to test for COVID-19, using at-home rapid antigen tests or the more accurate clinic-provided PCR tests with a longer ...

Over the past four years, many of us have become accustomed to a swab up the nose to test for COVID-19, using at-home rapid antigen tests or the more accurate clinic-provided PCR tests with a longer ...

COVID cases are starting to creep up again in the U.S., and it’s understandable to have new questions about the virus and the newest CDC guidance on isolation after a positive test. After all, it’s ...

Point-of-care testing for common sexually transmitted infections may reduce overuse of antibiotics and improve emergency ...