Although chlamydia is highly contagious, it does not always transmit to a person’s sexual partners. It is also possible to have a false-negative or false-positive test result. Having more frequent sex ...

President Joe Biden is one of the latest patients to experience a "rebound" coronavirus infection following a course of Paxlovid, an antiviral used to treat people at risk of severe illness from covid ...

If you take a COVID test and it comes back negative, that may not mean you're in the clear just yet. For those feeling ill, particularly those who had a known COVID exposure, experts caution that one ...