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  • Dragunov
    Senior Member
    • Dec 2008
    • 1953

    Like I said......

    Aerosolized.

  • #2
    Sig556swat
    Senior Member
    • Apr 2009
    • 655

    No evidence of claim. Hypothesis

    Comment

    • #3
    • #4
      capo
      Veteran Member
      • Nov 2007
      • 4756

      Like I said......

      Most any respiratory virus can be airborne, but via aerosol or droplet? Two variables help determine that.

      1) is the virus able to survive on small particle aerosols which can ride air currents to stay aloft for hours or is it only able to stay active in larger droplets which precipitate out of the air onto surfaces in a matter of seconds?

      2) what viral load (number of virus particles) is required for an exposure to trigger infection?

      Those two variables are primary drivers of how a respiratory virus spreads through air. Not many viruses are adept at spreading via aerosol because it's a rare virion that can both remain active for hours in the hostile environment of open air and is so infectious it only takes a small number of them to trigger an infection.

      If this virus was adept at spreading that way we would expect to see a spread rate like measles, which is really good at a aerosol dispersion. R0 for measles is 12-18 in large part due to how well it aerosilzes. We don't see that with SARS-CoV2 so we can begin to see if this virus is capable of spreading through aerosols it doesn't seem very good at it.

      Comment

      • #5
        Dragunov
        Senior Member
        • Dec 2008
        • 1953

        Originally posted by capo
        Most any respiratory virus can be airborne, but via aerosol or droplet? Two variables help determine that.

        1) is the virus able to survive on small particle aerosols which can ride air currents to stay aloft for hours or is it only able to stay active in larger droplets which precipitate out of the air onto surfaces in a matter of seconds?

        2) what viral load (number of virus particles) is required for an exposure to trigger infection?

        Those two variables are primary drivers of how a respiratory virus spreads through air. Not many viruses are adept at spreading via aerosol because it's a rare virion that can both remain active for hours in the hostile environment of open air and is so infectious it only takes a small number of them to trigger an infection.

        If this virus was adept at spreading that way we would expect to see a spread rate like measles, which is really good at a aerosol dispersion. R0 for measles is 12-18 in large part due to how well it aerosilzes. We don't see that with SARS-CoV2 so we can begin to see if this virus is capable of spreading through aerosols it doesn't seem very good at it.
        Tell me this after you've spent four years or so working in a Lab. Stop believing everything you read.

        BTW, Measles have a R0 of 2-2.5. It requires only ONE virus under the right circumstances, to cause an infection.
        Last edited by Dragunov; 03-31-2020, 10:17 AM.

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        • #6
          Sig556swat
          Senior Member
          • Apr 2009
          • 655

          Originally posted by Dragunov
          Tell me this after you've spent four years or so working in a Lab. Stop believing everything you read.

          BTW, Measles have a R0 of 2-2.5. It requires only ONE virus under the right circumstances, to cause an infection.
          Actually if you look it up Measles R0 is 12-18

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          • #7
            capo
            Veteran Member
            • Nov 2007
            • 4756

            Originally posted by Dragunov
            Tell me this after you've spent four years or so working in a Lab. Stop believing everything you read.

            BTW, Measles have a R0 of 2-2.5. It requires only ONE virus under the right circumstances, to cause an infection.

            I stand by my original statement and pointing out how small a viral load measles needs to spread is an agreement with me. It's one of the two primary variables I listed so don't know why you consider that fact a rebuttal.

            Can a single person infect others in a sports stadium? Yes. An infected person on a plane? Ditto. A doctor’s office? Disneyland? Yessiree. The power of #measles is almost legendary.


            PubMed® comprises more than 40 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full text content from PubMed Central and publisher web sites.

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            • #8
              Dragunov
              Senior Member
              • Dec 2008
              • 1953

              Originally posted by Sig556swat
              Actually if you look it up Measles R0 is 12-18
              No, it's not. Lab results for many years have had it at 2-2.5. Any "new" publication that says different, is suspect. Chicken pox has approximately the same R0.

              The EVIDENCE says COVID-19, is airborne. At least to a point. I remember Measles going around. If it were 12-18, EVERYONE on the planet would've gotten it. My sister got it, my parents, and next door neighbors, never got it, and I never got it. If it was truly airborne at R0 12-18, my parents, and neighbors would've gotten it. Same with Chicken pox. My sister gave it to my mom, but my dad and I, never got it.

              When I was in third grade, two of my classmates had to leave school because of measles. All of our class was exposed, as both had an active case of it. No one else in our class caught it. If the R0 was TRULY any higher than 2.5, MOST of us, would've gotten it.

              THIS virus just "pops up" in places it shouldn't, or where it's not expected. "Droplets" don't work that way. Ask the Italians, and Iranians. It may not be as virulent, as the fictional portrayal of Filovirus in the movie "Outbreak", but none-the-less, it's airborne.

              A single "flu" virus introduced into 100 rats, caused infection in 52 of them. Experiment done in BioLab, at Univ. Cincinnati, 1981. Granted, this is under controlled conditions in a lab, but still, the potential under certain circumstances is there. This also depends on the virus. We just don't know for sure about COVID-19 if this is true or not yet.

              Evidence suggests, it is airborne.
              Last edited by Dragunov; 03-31-2020, 11:05 AM.

              Comment

              • #9
                capo
                Veteran Member
                • Nov 2007
                • 4756

                Originally posted by Dragunov
                No, it's not. Lab results for many years have had it at 2-2.5. Any "new" publication that says different, is suspect. Chicken pox has approximately the same R0.

                The EVIDENCE says COVID-19, is airborne. At least to a point. I remember Measles going around. If it were 12-18, EVERYONE on the planet would've gotten it. My sister got it, my parents, and next door neighbors, never got it, and I never got it. If it was truly airborne at R0 12-18, my parents, and neighbors would've gotten it. Same with Chicken pox. My sister gave it to my mom, but my dad and I, never got it.

                THIS virus just "pops up" in places it shouldn't, or where it's not expected. "Droplets" don't work that way. Ask the Italians, and Iranians. It may not be as virulent, as the fictional portrayal of Filovirus in the movie "Outbreak", but none-the-less, it's airborne.

                A single "flu" virus introduced into 100 rats, caused infection in 52 of them. Experiment done in BioLab, at Univ. Cincinnati, 1981. Granted, this is under controlled conditions in a lab, but still, the potential under certain circumstances is there. This also depends on the virus. We just don't know for sure about COVID-19 if this is true or not yet.

                Evidence suggests, it is airborne.

                Before vaccination against measles in the 60's everyone in the world didcatch it. It was known as a childhood disease simply because everyone contracted it before they even had a chance to reach adulthood, often before they even reached adolescence. IIRC median age for measles contraction was 5 and almost everyone went through it by their mid teens.

                You need to link to some reputable sources to support your measles argument, among others the NIH and CDC don't agree with you.

                Comment

                • #10
                  Dragunov
                  Senior Member
                  • Dec 2008
                  • 1953

                  Originally posted by capo
                  Before vaccination against measles in the 60's everyone in the world didcatch it. It was known as a childhood disease simply because everyone contracted it before they even had a chance to reach adulthood, often before they even reached adolescence. IIRC median age for measles contraction was 5 and almost everyone went through it by their mid teens.

                  You need to link to some reputable sources to support your measles argument, among others the NIH and CDC don't agree with you.
                  This:


                  is not likely to happen with a non-airborne virus.

                  Comment

                  • #11
                    capo
                    Veteran Member
                    • Nov 2007
                    • 4756

                    Like I said......

                    Originally posted by Dragunov
                    This:


                    is not likely to happen with a non-airborne virus.

                    Nothing in that article backs up anything you've claimed about measles infectivity.

                    Maybe stop getting your epidemiology news from partisan political websites. I quoted a renowned American epidemiologist and linked to a NIH published study, if you don't consider those sources reputable I think we're done here.

                    Edit: also it IS airborne, the question is whether it spreads readily by aerosol or droplet.
                    Last edited by capo; 03-31-2020, 11:33 AM.

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                    • #12
                      FireCloud9
                      Senior Member
                      • Jun 2015
                      • 792

                      Breitbart?

                      This is what passes as a scientific source?


                      sigpic

                      U.S. Army SGT 3ID 1st BN 30th IN Veteran DAV '84-'88 (Germany) | G43, P99C, PPS / PPQ M1 (Classic), HK P2000

                      War Is a Racket by Two-time Medal of Honor recipient, USMC MG Smedley Butler

                      Best Place to Retire

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                      • #13
                        therealnickb
                        King- Lifetime
                        CGN Contributor - Lifetime
                        • Oct 2011
                        • 8955

                        I’m old enough to remember parents purposely getting the kids infected with measles just to get them all done at once. If someone in the neighborhood brought it home, everyone would visit.

                        Comment

                        • #14
                          stonefly-2
                          Veteran Member
                          • Mar 2013
                          • 4993

                          Originally posted by FireCloud9
                          Breitbart?

                          This is what passes as a scientific source?



                          Branched out from just weed have you?
                          What do you call the people that abandoned the agenda of John Kennedy and adopted the agenda of Lee Oswald?

                          Pronouns: "Dude" and "Playa".

                          https://billstclair.com/Unintended-Consequences.pdf


                          I was born under a wandrin star.

                          Comment

                          • #15
                            FireCloud9
                            Senior Member
                            • Jun 2015
                            • 792

                            Originally posted by stonefly-2
                            Branched out from just weed have you?
                            ad hominem

                            /end

                            Thanks for playing.

                            sigpic

                            U.S. Army SGT 3ID 1st BN 30th IN Veteran DAV '84-'88 (Germany) | G43, P99C, PPS / PPQ M1 (Classic), HK P2000

                            War Is a Racket by Two-time Medal of Honor recipient, USMC MG Smedley Butler

                            Best Place to Retire

                            Comment

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