Two new medical studies suggest that people who are infected once with COVID-19 are very unlikely to test positive again for up to six months and possibly longer. Fast Facts US passes 1 million vaccinated US deaths in 2020 top 3 million, by far most ever counted"It's very, very rare" to get reinfected, he said. Both studies used two types of tests. One is a blood test for antibodies, which attach to a virus and help to eliminate it; antibodies can linger for many months after infection. The other type of test uses nasal or other samples to detect the virus or bits of it, suggesting current or recent infection.

Source: Fox News December 24, 2020 03:45 UTC