Medically reviewed by Kate Colby, MPH People with asymptomatic or mild COVID illness generally test negative after nine days, but a polymerase chain reaction (PCR) test can still be positive for up to ...

After exposure to COVID-19, most infections become detectable within 3–7 days. Testing too early can yield false negatives, ...

EAST MEADOW, Long Island (WABC) -- An inmate at a Long Island jail has tested positive for the novel coronavirus. Officials say they are trying to go back through the contact the inmate had with other ...