The spread of Covid-19 by those who do not show symptoms of being infected by the contagion appears to be rare, Maria Van Kerkhove, the World Health Organization's technical lead for coronavirus response and head of the emerging diseases, said during a media briefing in Geneva on Monday.
"From the data we have, it still seems to be rare that an asymptomatic person actually transmits onward to a secondary individual," CNN quoted Van Kerkhove as saying on Monday.
"We have a number of reports from countries who are doing very detailed contact tracing. They're following asymptomatic cases, they're following contacts