Symptomless transmission makes the coronavirus far
harder to fight. But health officials dismissed the risk for months, pushing
misleading and contradictory claims in the face of mounting evidence.
By Matt Apuzzo, Selam Gebrekidan and David D.
Kirkpatrick (June 27, 2020)
From:
“[…] The two-month delay was a product of faulty
scientific assumptions, academic rivalries and, perhaps most important, a
reluctance to accept that containing the virus would take drastic measures. The
resistance to emerging evidence was one part of the world’s sluggish response
to the virus.
It is impossible to calculate the human toll of that
delay, but models suggest that earlier, aggressive action might have saved tens
of thousands of lives. Countries like Singapore and Australia, which used
testing and contact-tracing and moved swiftly to quarantine seemingly healthy
travelers, fared far better than those that did not.
It is now widely
accepted that seemingly healthy people can spread the virus, though uncertainty
remains over how much they have contributed to the pandemic. Though estimates
vary, models using data from Hong Kong, Singapore and China suggest that 30 to
60 percent of spreading occurs when people have no symptoms […]”
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