If the result is still negative, but the symptoms persist or worsen, a new test should be done on the fourth day. In these cases, the ideal is to go to a test site or health center for a PCR test ...

A false-negative pregnancy test may happen if you don't take the test first thing in the morning. It could also occur if you take the test less than 10 days after conception. Checking the results ...

You may test negative with a rapid antigen test, but a PCR test can still detect the virus. Research has shown that PCR tests ...

A person may choose to take a pregnancy test if their period is late. However, the result can be negative if a person is pregnant but takes the test too soon. The ovaries release an egg during ...

"If your test comes back negative at home, and you still have those typical symptoms of Covid-19 – sore throat, cough, fever, body aches – that's when I'm recommending that people go in to see ...