The Number Of Coronavirus Silent Carriers Much Greater Than Previously Thought
Scientists are calling for urgent studies to determine the proportion of people with coronavirus who show no, or delayed, symptoms amid concern that the number of silent carriers may be greater than previously thought.
Iceland, which says it’s tested a higher proportion of inhabitants than any other country, found that about half those who tested positive have no symptoms of Covid-19, Thorolfur Gudnason, the nation’s chief epidemiologist, told BuzzFeed News. As many as a third of the people who test positive show delayed symptoms or none at all, the South China Morning Post reported Sunday, citing classified data from the Chinese government.
The high rate of asymptomatic cases can complicate efforts to stop the spread of the disease because many countries aren’t testing people unless they’re seriously ill. A report by a joint WHO-China mission last month described such infections as “relatively rare” and not appearing to be major drivers of transmission.