Patients most infectious when they first show symptoms: WHO

Studies show people with the coronavirus are most infectious when they first show symptoms, World Health Organizationhas said.

Maria van Kerkhove, an epidemiologist and the World Health Organization’s technical lead on the pandemic, made the revelation in a briefing on Tuesday.

She said a sub-set of people do not develop symptoms, but can still infect others, and as many as 40% of transmissions may be by asymptomatic cases.