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This is very frightening: many CV infections spread by people yet to show symptoms
Coronavirus: many infections spread by people yet to show symptoms – scientistsFindings mean that isolating people once they start to feel ill is less effective than hoped
Read it here: https://www.theguardian.com/science/2020/mar/12/coronavirus-most-infections-spread-by-people-yet-to-show-symptoms-scientists
(snips)
An analysis of infections in Singapore and Tianjin in China revealed that two-thirds and three-quarters of people respectively appear to have caught it from others who were incubating the virus but still symptom-free.
The finding has dismayed infectious disease researchers as it means that isolating people once they start to feel ill will be far less effective at slowing the pandemic than had been hoped.
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The finding confirms recent comments from Maria Van Kerkhove, head of the World Health Organization’s emerging diseases and zoonoses unit, who said preliminary data showed patients shed more virus in the early stages of the disease, including when presymptomatic. A separate study that tracked nine patients in Germany found that levels of the virus might already be in decline when symptoms come on.
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Rowland Kao, who studies infectious disease dynamics at the University of Edinburgh, said: “One of the factors that has distinguished this coronavirus pandemic from the Sars epidemic in 2003, is that Sars was infectious only after the development of clinical signs, which made it relatively easier to control. For the current pandemic, from very early on it was suspected that a substantial number of transmissions were arising before clinical signs appeared.
The finding has dismayed infectious disease researchers as it means that isolating people once they start to feel ill will be far less effective at slowing the pandemic than had been hoped.
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The finding confirms recent comments from Maria Van Kerkhove, head of the World Health Organization’s emerging diseases and zoonoses unit, who said preliminary data showed patients shed more virus in the early stages of the disease, including when presymptomatic. A separate study that tracked nine patients in Germany found that levels of the virus might already be in decline when symptoms come on.
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Rowland Kao, who studies infectious disease dynamics at the University of Edinburgh, said: “One of the factors that has distinguished this coronavirus pandemic from the Sars epidemic in 2003, is that Sars was infectious only after the development of clinical signs, which made it relatively easier to control. For the current pandemic, from very early on it was suspected that a substantial number of transmissions were arising before clinical signs appeared.
I only regret that all Americans are not in the know like members of DU are today.
KY.............
