Evidence review confirms CDC guidance about infectivity of novel coronavirus

A new review of dozens of studies suggests that people may shed virus for prolonged periods, but those with mild or no symptoms may be infectious for no more than about 10 days. People who are severely ill from COVID-19 may be infectious for as long as 20 days, according to the review.

from Health & Medicine News -- ScienceDaily https://www.sciencedaily.com/releases/2020/10/201021085113.htm