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Medicine Science

The WHO Walks Back an Earlier Assertion That Asymptomatic Transmission is 'Very Rare' (nytimes.com) 122

A top expert at the World Health Organization on Tuesday walked back her earlier assertion that transmission of the coronavirus by people who do not have symptoms is "very rare." From a report: Dr. Maria Van Kerkhove, who made the original comment at a W.H.O. briefing on Monday, said that it was based on just two or three studies and that it was a "misunderstanding" to say asymptomatic transmission is rare globally. "I was just responding to a question, I wasn't stating a policy of W.H.O. or anything like that," she said. Dr. Van Kerkhove said that the estimates of transmission from people without symptoms come primarily from models, which may not provide an accurate representation. "That's a big open question, and that remains an open question," she said.

Scientists had sharply criticized the W.H.O. for creating confusion on the issue, given the far-ranging public policy implications. Governments around the world have recommended face masks and social distancing measures because of the risk of asymptomatic transmission. A range of scientists said Dr. Van Kerkhove's comments did not reflect the current scientific research. "All of the best evidence suggests that people without symptoms can and do readily spread SARS-CoV-2, the virus that causes Covid-19," scientists at the Harvard Global Health Institute said in a statement on Tuesday.

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The WHO Walks Back an Earlier Assertion That Asymptomatic Transmission is 'Very Rare'

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  • by L. J. Beauregard ( 111334 ) on Tuesday June 09, 2020 @03:33PM (#60165352)

    The earlier article said that people who are "asymptomatic" -- who never develop symptoms -- would not transmit the virus, but those who were "presymptomatic" could.

    If I have no symptoms, either I am uninfected, and cannot transmit the virus; or I am infected but will never develop symptoms, and according to the previous article will not likely transmit the virus; or I am infected and will eventually get sick, and according to the previous article I might be contagious. I still don't know whether I can spread the virus or not. But the mouth breathers are not going to make that distinction.

    • The previous statement is already being held up as solid proof, by the same people that have been screaming from the rooftops to defund the WHO for the past few weeks, that the lockdowns are completely uncalled for and the virus isn't as dangerous as we've been told. It's one of the biggest blunders the WHO could have made if they want to retain any belief in the general public that the virus is dangerous.

      Of course, the conspiracy theorists will have a field day with this statement and retraction in such s

      • by Anonymous Coward

        Profitable to WHO?

        You answered your own question.

      • If simply 100% compliance of mask wearing is all it takes to keep the stores open, and keep other things open so that our economy does not get destroyed, then I have no problem wearing a damn mask. I think the lockdowns wouldnt have been necessary if we had other tools in place, but a lot of that was compensation for the fact we gave china all our disposable PPE in January when the WHO was downplaying the outbreak in wuhan, at the request of the Chinese government. It wasnt the virus alone that caused a loc

      • It's one of the biggest blunders the WHO could have made if they want to retain any belief in the general public that the virus is dangerous.

        At this stage, anyone who doesn't believe the virus is dangerous. Does so for political reasons. They ain't going to change for anything other than political reasons either. It won't be the WHO telling them what to think.

    • The earlier article said that people who are "asymptomatic" -- who never develop symptoms -- would not transmit the virus, but those who were "presymptomatic" could.

      Any claim asymptomatic people can't spread is nonsense.
      https://www.nejm.org/doi/full/... [nejm.org]

  • Seems it's best that when the WHO says something, you should wait a week or so to see if they're actually going to stick to their story.
    • Re: (Score:2, Offtopic)

      by iggymanz ( 596061 )

      Looking at what WHO really does, compared to what they tally and report and predict, I'm thinking we really don't need the WHO. or the United Nations for that matter.

      • Yeah, this is exactly why we need to stop funding them. They piss away money and are inept. I don't have a lot of love for the CDC either, but at least we can hold them accountable.
      • by rastos1 ( 601318 )

        Looking at what WHO really does ...

        What WHO really does? I always thought of WHO as Interpol of police. They do not carry out their own investigation. They do not arrest people. They just facilitate exchange of information. They manage people and material exchange. But if you came up with some claim, back it up by some evidence (valid or not) and pass that information to WHO, they are just going to pass it on. They do not try to reproduce your results and validate them. At best they can pass it along wit

    • Given they've only walked back one statement for being technically inaccurate do you have any basis for your assertion other than being a raving republican troll?

      Or maybe you're one of those people who will ignore everything because we can never be 100% sure about something. I haven't checked your post history and it's been a while since we discussed this, but I'm guessing you're also a climate change denier because you think the science isn't settled right?

      • So when they stated it did not spread from person-to-person [businessinsider.com], then later "corrected" the statement, that's not an error?

        When they originally were adamant you should not wear a mask unless you were a health-care worker, and later "corrected" their recommendation and say you should [khn.org] wear a mask?

        This is their 3rd strike in just a few months, on a singular worldwide pandemic. I think it's OK to take what they say, wait a few weeks and see if they change course, and THEN consider their recommendations.

        • by Anonymous Coward

          So when they stated it did not spread from person-to-person

          Just the usual Lynnwood lies.
          WHO didn't say it did not spread person to person. You are just lying.

    • But if you dare question them before that then you get banned from social media.
  • All of the best evidence suggests that people without symptoms can and do readily spread SARS-CoV-2, the virus that causes Covid-19

    And what actual evidence is that? Just in case it needs to be pointed out, absence of evidence is not evidence of absence. In other words, just because community transmission is occurring and you can't figure out why, that's not evidence of asymptomatic transmission. Evidence of asymptomatic transmission is documented cases of a person confirmed to have an active SARS-CoV-2 infection, and confirmed to have no symptoms (rather than just self-reporting no symptoms) passing their infection to others.

    • by BranMan ( 29917 )

      This is just one instance, but the choir practice in Washington State - remember that? 60 people - all with NO symptoms, they were very careful about that - gathered for a choir practice. A couple of hours or so. Two weeks later, 45 of them have it. A week later and it was over 50. Out of 60. THAT is evidence.

      YOU! Over there - NO SINGING! Probably only one out of the 60 had it - spraying CoV-2 around the room like a god-damn flamethrower. Pun intended.

      • Your information is inaccurate. Read the CDC summary of the incident here. Check out this part in particular:

        Among 61 persons who attended a March 10 choir practice at which one person was known to be symptomatic, 53 cases were identified, including 33 confirmed and 20 probable cases (secondary attack rates of 53.3% among confirmed cases and 86.7% among all cases).

        • by BranMan ( 29917 )

          Huh - thanks uh... I'll just call you Jabberwalki. I did not know that. Wow, that group has just been upgraded to complete idiots in my book. Still shows the POWER of singing though - just look at those infection rates!

  • Whether it's rare or common, though, is not really a significant issue for policy planners. The issue is whether it's present, or "vanishingly rare to absent".

    If asymptomatic transmission absent (or vanishingly rare), you can use symptom detection (like fever detection by remote infrarared thermometers or worker temperature-sensing wristbands) to segregate potential spreaders from the rest of the population. This lets you reopen from quarantine while you still have substantial numbers of infected and of vulnerable, but don't have an immunization, yet still have only a small number of extra cases and keep the pandemic dying out.

    If it's merely rare, symptom detection is not enough. One spreader in a crowd can infect hundreds - who then go through the typical cycle and infect more. You get a lot of extra cases and deaths, and may return the pandemic to exponential growth. So, though they still help, symptom detectors don't save you. You need better screening, or to throw in the towel and retain isolation measures that keep most people safe even with the pandemic in progress.

    Consider that the US and other countries used symptom screening of air travelers for a couple months, yet the virus still took hold in essentially every country on Earth. To me that's an indicator that transmission from asymptomatic cases (whether "presympomatic" or who eventually run the whole disease course without detectable symptoms) is likely insufficiently rare for symptom detection alone to be adequate for reopening strategies.

    • The larger issue is testing policy which has been botched from the start. It seems like a good idea with limited tests to just test those with symptoms or people around those with symptoms. You do also need to do some random testing to get an idea of the real infection rates which they've done very poorly with. Even with antibody tests they've not done that very well.
  • I suspect the studies in Taiwan include elevated temperature as a symptom. I have not had to have my temperature checked anywhere that I regularly go since the pandemic started, so how would I know if I had symptoms?
  • Definition of walk back. transitive verb. US. : to retreat from or distance oneself from (a previously stated opinion or position) try not to say anything in the primary campaign that you might need to walk back in the general election.

  • by RogueWarrior65 ( 678876 ) on Tuesday June 09, 2020 @10:12PM (#60166474)

    Jeez, you guys haven't gotten a single model prediction correct. Why the hell should we believe you now?

  • The WHO is working overtime to demonstrate that Trump was right about it. It's almost as if the fix is in.
  • They walked back the walk back?

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