Covid-19 patients are no longer infectious after 11 days of getting sick even though some may still test positive, according to a new study by infectious disease experts in Singapore.

A positive test “does not equate to infectiousness or viable virus,” a joint research paper by Singapore’s National Centre for Infectious Diseases and the Academy of Medicine, Singapore said. The virus “could not be isolated or cultured after day 11 of illness.”

https://www.bloomberg.com/news/articles/2020-05-24/covid-19-patients-not-infectious-after-11-days-singapore-study