Corona Virus 2019-nCoV

Discussion in 'World Events' started by Quantum Quack, Jan 29, 2020.

  1. Quantum Quack Life's a tease... Valued Senior Member

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    The droplets of viral water evaporate into what?
     
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  3. Quantum Quack Life's a tease... Valued Senior Member

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    can you support your claim by way of links please.

    I believe you will be hard pressed to find one virologist let alone every virologist to agree...
     
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  5. exchemist Valued Senior Member

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    OK. But from what I have read, common cold viruses and flu can survive for a while in the dry nuclei -salts, dried mucus and viruses, I suppose - left behind when an aerosol droplet evaporates and it is this that some seem to treat as "airborne transmission", as opposed to the inhalation of wet aerosol droplets from a person close by, which is sometimes called "direct"......not to be confused with contact transmission which is by actual touch.

    But while some articles I have read speak of these three different modes (airborne, direct, contact), others lump wet aerosols and dry evaporated nuclei together, calling both of them "airborne", leaving just two options: airborne and contact. It seems rather inconsistent.
     
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  7. exchemist Valued Senior Member

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    The air, obviously.

    Because the droplets are not pure water, this leaves behind a very tiny dry nucleus, composed I imagine of dried mucus, salts and viruses. These particles are so small they do not settle out of the air, so they waft around. The issue then is how long dry viruses in this state can remain active. This depends on the virus.
     
  8. Quantum Quack Life's a tease... Valued Senior Member

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    22,416
    perhaps try this:
    If the virus can survive in water droplets of 10 microns or less it is considered as airborne aerosol. ( via water vapor) (inhaled direct lung transmission)
    If the virus can not survive in water droplets of 10 microns or less but in larger droplets >20 microns it is considered as direct/contact transmission. ( expectorant, spittle, nasal spray, touch digestion)
     
  9. Quantum Quack Life's a tease... Valued Senior Member

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    yes and no... the water droplet evaporates into water vapor. If the virus can survive in water vapor it becomes an aerosol/airborne. If it can not survive in water vapor it is not considered as airborne.
     
  10. exchemist Valued Senior Member

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    Why would a virus find conditions inside a 10 micron droplet different from those in a 20 micron droplet?

    A difference between wet and dry I can understand, but not between 10 and 20 microns, given that the virus itself is one or two orders of magnitude smaller than either.
     
  11. exchemist Valued Senior Member

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    This makes no sense. Water vapour is a gas. It mixes completely with the surrounding air. There is no water vapour phase for a virus to live in.

    Furthermore the droplets themselves are already an aerosol. So it is not a question of something "becoming" an aerosol when the water evaporates. A wet aerosol becomes a dry one, that's all.

    You seem not to understand the terms you are using.
     
  12. Quantum Quack Life's a tease... Valued Senior Member

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    You are the one asking the questions not me...
    watch this video again. It can't get much clearer than that...


    google "water vapor size"

    then google "CO2 size"or O2 size..
     
    Last edited: Feb 13, 2020
  13. Quantum Quack Life's a tease... Valued Senior Member

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    22,416
  14. exchemist Valued Senior Member

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    "Water vapour size" is a meaningless term. I'm certainly not going to google that.

    And actually the video is very badly explained - as videos almost always are, compared to the printed word. The speaker does not clarify whether he is talking of wet or dry aerosol when he speaks of "airborne", as opposed to what he calls "droplet" transmission. He just says airborne involves particles <10 micron that travel longer distances. Which makes sense but does not address the issue of what limits the ability of the virus to stay active in such aerosols.

    From what I have read - which also fits what billvon says - it is whether the particles are wet or dry, and then whether the virus can stay active when dry, that determines this.
     
  15. Quantum Quack Life's a tease... Valued Senior Member

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    22,416
    suit your self...
     
  16. billvon Valued Senior Member

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    Water vapor. And bits of dried virus. Which, often, kills the virus. (One reason that sputum and blood are more dangerous, because they take longer to completely dry out since there are a lot of solids in there.)
     
  17. Quantum Quack Life's a tease... Valued Senior Member

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    are you claiming that a virus can not survive in water vapor droplets between 10-15 microns in size?
     
  18. Bells Staff Member

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    Billvon has been saying and quoting what the people studying and advising on this have been saying right from the start, unlike you. For example:

    You disputed him on this, despite his quoting the CDC.

    In fact, you went on to troll and you are still trolling, by deliberately misrepresenting what people are saying. It is despicable.
     
  19. Quantum Quack Life's a tease... Valued Senior Member

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    Ok I take that is a no. You can not support your claim that

    Personal observation: Any one who challenges you is a troll and despicable...

    If you do not wish to discuss the topic in a reasonable and objective fashion then don't.
     
    Last edited: Feb 13, 2020
  20. billvon Valued Senior Member

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    ?? No. I am answering your question. Did you not want an answer?
     
  21. Quantum Quack Life's a tease... Valued Senior Member

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    sure... I believe you even if others wouldn't...(sarc)

    Please clarify the question you feel you are answering...
     
  22. billvon Valued Senior Member

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    17,891
    The question you asked, which was "The droplets of viral water evaporate into what?" The answer to that is "water vapor, and bits of dried virus."

    Now, did you have a different question?
     
  23. Quantum Quack Life's a tease... Valued Senior Member

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    22,416
    oh I see... yes... ok then the following question in post #134
    ? Yes or No would suffice...
     

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