Studies have shown that people may be contagious for about two days before developing COVID-19 symptoms. In fact, right before developing symptoms is when people are likely the most contagious, said ...

A new study out of South Korea suggests that people who test positive for COVID-19 a second time may no longer be contagious. For the study, published Tuesday by South Korea's Centers for Disease ...

A positive COVID-19 test only tells you that you have the novel coronavirus in your body but cannot tell how contagious you are. Testing positive for COVID-19 means you have pieces of the virus in ...

Even before Candace Palmerlee tested positive for the coronavirus, she began isolating herself at home, not wanting to pass the infection on to others. When her positive test result was confirmed on ...

The timing of symptom onset depends on lots of factors, including the amount of virus to which someone was exposed, Hotez says. Their level of pre-existing immunity may also affect the likelihood or ...

Medically reviewed by Kate Colby, MPH The COVID-19 incubation period is the time between exposure to the SARS-CoV-2 virus and the onset of symptoms.Over 98% of people in the U.S. have some COVID-19 ...