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@WHO recently published a summary of transmission of #COVID19, incl. symptomatic, pre-symptomatic and asymptomatic transmission
See page 2 of
https://www.who.int/publications/i/item/advice-on-the-use-of-masks-in-the-community-during-home-care-and-in-healthcare-settings-in-the-context-of-the-novel-coronavirus-(2019-ncov)-outbreak …
In this summary, we state: "Comprehensive studies...
2/2 ... on transmission from asymptomatic individuals are difficult to conduct, but the available evidence from contact tracing reported by Member States suggests that asymptomatically-infected individuals are much less likely to transmit the virus than those who develop symptoms
additional points: In these data, it is impt to breakdown truly asymptomatic vs pre-symptomatic vs mildly symptomatic also to note that the % reported or estimated to be "asymptomatic" is not the same as the % that are asymptomatic that actually transmit
Sorry to over-parse this, BUT: Asymptomatically-infected patients are patients who are infected through asymptomatic transmission, which is VERY different from what you seemed to say in the news conference. Can you clarify?
That's not how I read it. Asymptomatically-infected would seem to denote those who have been infected but have no symptoms. Like the term "walking wounded" doesn't mean people who were wounded while walking.
Wouldn't asymptomatic individuals provide less evidence by virtue of the fact that they are asymptomatic?
What is the % of asymptomatic and % of pre-symptomatic COVID-19 from you data worldwide? Thank you.
A few other studies suggests significant fraction of transmission are during the pre-symptomatic phase: https://www.nature.com/articles/s41591-020-0869-5?fbclid=IwAR3x2cKnIDqZfFIpOn6R04KCFDkD7y2Fn1jVlQHC1G8Uq9iCt0w8H7OXmpk … https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2020.25.17.2000257 … and very high Ct threshold during the pre-symptomatic phase:https://www.nejm.org/doi/full/10.1056/NEJMoa2008457 …
Nursing home is special
There are insufficient data to make this assertion!
No prospective studies of people infected without symptoms and precise definition of magnitude of their transmissibility.
Viral load = w/ or w/o symptoms
cc @DrTedroshttps://twitter.com/EricTopol/status/1269359663591510016 …
I agree that we need to see the evidence, but what’s the rationale for tagging her boss?
Not true! Nearly Half of Coronavirus Spread May Be Traced to People Without Any Symptoms Study: June 3 https://www.acpjournals.org/doi/10.7326/M20-3012 …
If I understand correctly, she says most of them actually did have some mild symptoms, which were unnoticed in the research.
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