Healthy-looking people spread coronavirus, more studies say
1 / 2Virus Outbreak Spread Without SymptomsFILE - In this Tuesday, March 31, 2020 file photo, neighbors line up for free food staples outside Santa Ana primary school in Asuncion, Paraguay, part of an already existing food program through the Education Ministry, as people stay home from work amid the spread of the COVID-19 coronavirus.
The findings complicate efforts to gain control of the pandemic and reinforce the importance of social distancing and other measures designed to stop the spread, experts said. One of those infections was particularly striking. A 52-year-old woman's infection was linked to her sitting in a seat at a church that had been occupied earlier in the day by two tourists who showed no symptoms but later fell ill, investigators said after they reviewed closed-circuit camera recordings of church services.
It remains unclear how many new infections are caused by each type of potential spreader, said Meyers, who was not involved in the Singapore study but was part of the earlier one focused on China. Redfield's comment was in response to a question about whether the agency is going to recommend that people who seem healthy wear masks or face coverings when they go out. He said the agency is reviewing its guidance, looking at research in Singapore, China and other places in making that decision.
In the initial months of the pandemic, health officials based their response on the belief that most of the spread came from people who were sneezing or coughing droplets that contained the virus.
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