A study published in Nature Medicine found that people infected with novel coronavirus (SARS-CoV-2) start shedding the virus two-three days before symptoms show up. Studying 77 pairs of injector-infected pairs, the researchers estimate that 44% of secondary infected people can spread the virus even before symptoms show up. In a study published recently, researchers […]
Since the proportion of pre-symptomatic transmission is substantial, maintaining hand hygiene and social distancing can play an important role in containing virus spread in the community.
via Substantial coronavirus spread seen before symptoms show up — Science Chronicle

What are injector infected? Are these volunteers?
All the more reason to continue frequent handwashing and social distancing. And not to resume business as usual too soon.