Ok, so. I read the original thing. It would seem to predict, wouldn't it, that dry climate transmission would be much lower than wet. Put it round the other way: these data would be a plausible explanation for why the disease is less prevalent in dry climates. But it isn't. Am I reading it wrong?
n Nick Thompson thompnicks...@gmail.com https://wordpress.clarku.edu/nthompson/ -----Original Message----- From: Friam <friam-boun...@redfish.com> On Behalf Of glen Sent: Wednesday, January 12, 2022 11:00 AM To: friam@redfish.com Subject: Re: [FRIAM] preprint aerosol covid Yeah, I enjoyed the closed rooms at lockheed. But only the 60Hz ones. The 400Hz rooms were horrible. If the results check out, it spells trouble for me, though, hanging out in breweries ... which usually have higher than normal relative humidity. Stupid virus. On 1/12/22 08:56, Marcus Daniels wrote: > We have enough air purifiers to filter the air in the house six times an > hour. It reminds me of the days when I had bitcoin miners running. > The noise is like being in an airplane all the time. I rather like fan > noise though. I could sleep in a machine room. > > Marcus > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- > ---------- > *From:* Friam <friam-boun...@redfish.com> on behalf of glen > <geprope...@gmail.com> > *Sent:* Wednesday, January 12, 2022 9:25 AM > *To:* friam@redfish.com <friam@redfish.com> > *Subject:* [FRIAM] preprint aerosol covid The Dynamics of SARS-CoV-2 > Infectivity with Changes in Aerosol Microenvironment > https://www.medrxiv.org/content/10.1101/2022.01.08.22268944v1 > <https://www.medrxiv.org/content/10.1101/2022.01.08.22268944v1> >> Understanding the factors that influence the airborne survival of >> viruses such as SARS-CoV-2 in aerosols is important for identifying >> routes of transmission and the value of various mitigation strategies >> for preventing transmission. We present measurements of the >> stability of SARS-CoV-2 in aerosol droplets (∼5-10µm equilibrated >> radius) over timescales spanning from 5 seconds to 20 minutes using a >> novel instrument to probe survival in a small population of droplets >> (typically 5-10) containing ∼1 virus/droplet. Measurements of >> airborne infectivity change are coupled with a detailed >> physicochemical analysis of the airborne droplets containing the >> virus. A decrease in infectivity to ∼10 % of the starting value was >> observable for SARS-CoV-2 over 20 minutes, with a large proportion of >> the loss occurring within the first 5 minutes after aerosolisation. >> The initial rate of infectivity loss was found to correlate with >> physical transformation of the equilibrating droplet; salts within >> the droplets crystallise at RHs below 50% leading to a near instant >> loss of infectivity in 50–60% of the virus. However, at 90% RH the >> droplet remains homogenous and aqueous, and the viral stability is >> sustained for the first 2 minutes, beyond which it > decays to only 10% remaining infectious after 10 minutes. The loss of > infectivity at high RH is consistent with an elevation in the pH of the > droplets, caused by volatilisation of CO2 from bicarbonate buffer within the > droplet. Three different variants of SARS-CoV-2 were compared and found to > have a similar degree of airborne stability at both high and low RH. -- glen Theorem 3. There exists a double master function. .-- .- -. - / .- -.-. - .. --- -. ..--.. / -.-. --- -. .--- ..- --. .- - . FRIAM Applied Complexity Group listserv Zoom Fridays 9:30a-12p Mtn UTC-6 bit.ly/virtualfriam un/subscribe http://redfish.com/mailman/listinfo/friam_redfish.com FRIAM-COMIC http://friam-comic.blogspot.com/ archives: 5/2017 thru present https://redfish.com/pipermail/friam_redfish.com/ 1/2003 thru 6/2021 http://friam.383.s1.nabble.com/ .-- .- -. - / .- -.-. - .. --- -. ..--.. / -.-. --- -. .--- ..- --. .- - . FRIAM Applied Complexity Group listserv Zoom Fridays 9:30a-12p Mtn UTC-6 bit.ly/virtualfriam un/subscribe http://redfish.com/mailman/listinfo/friam_redfish.com FRIAM-COMIC http://friam-comic.blogspot.com/ archives: 5/2017 thru present https://redfish.com/pipermail/friam_redfish.com/ 1/2003 thru 6/2021 http://friam.383.s1.nabble.com/
