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Coronavirus Cases Without Symptoms Spur Call for Wider Tests

  • Iceland finds half of positive cases have no disease traits
  • Researchers call for wider testing to identify virus carriers
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WHO Has a Simple Message for All Countries: Test, Test, Test
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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.