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25 Nov, 5 tweets, 2 min read
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More from @jmcrookston

Jonathan Mesiano-Crookston Profile picture
15 Nov
Literally opened ONE article in my collection.

Rinderpest virus may transmit amongst cattle by aerosols.

From 1979.
2/
3/ virus more stable at low & high RH
Read 8 tweets
Jonathan Mesiano-Crookston Profile picture
4 Nov
Canada finally changes guidance that SARS-CoV-2 transmits in the air!

(Ignore the language about this being "new knowledge" etc that's just everybody saving face.)

Now get HCW all the protection they need because this isn't going away tomorrow ...
Lest there be any confusion at all, this is an excerpt from a 1980s article citing back to the 1930s/40s that measles was proven to be in the air. So no, this is not new. And in relation to coronaviruses, animal coronas were known to be in the air, and SARS and MERS suspected
And of course this needs to be reflected in HCW precautions, which still reflect droplet + N95 for aerosol-generating procedures only

canada.ca/en/public-heal…
Read 9 tweets
Jonathan Mesiano-Crookston Profile picture
3 Nov
@jljcolorado @kprather88 knew I posted it somewhere. Just a quick tag as reminder.

So "droplet" = "airborne across to next bed" maybe?

Hmm ...
Chapin said this and he was very fond of droplets because he felt they "made sense".

Not because he proved them but because he saw most transmission at short range.
Droplet is truly just short-hand for "aerosol infection that happened at short range".

(Other than a rare case where somebody actually sneezes into another's face.)
Read 8 tweets
Jonathan Mesiano-Crookston Profile picture
3 Nov
Norwalk disease causes vomiting which may launch millions of virus particles into the air, perhaps causing its explosive attack rate of over 50%.

Lancet.

1994. Image
Image
Image
Read 11 tweets
Jonathan Mesiano-Crookston Profile picture
31 Oct
In summer 2020, the WHO wrote an article to support droplet transmission of COVID-19.

What if I told you that it went horribly awry, and actually helped prove aerosol?

Good news!

Have I got a thread for you!
In summer 2020, the WHO committee that sets COVID-19 transmission guidelines wrote a piece.
It argued for droplet, and contained many misconceptions and logical errors that have been dealt with elsewhere. I won't get into those.

Read 13 tweets
Jonathan Mesiano-Crookston Profile picture
30 Oct
Just posting the charts from the presentation referred to in this article.

Toronto:
Peel
Ottawa
Read 5 tweets

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