A short thread examining expert advice on airborne transmission in this new @calgaryherald article. 1/ calgaryherald.com/news/local-new…
This whole paragraph is incorrect. Aerosol spread has been shown to be dominant, from well before Nov 2020. In fact, there is no evidence for droplet spread, and minimal evidence for contact. 2/ cdc.gov/coronavirus/20…
Incorrect. The new guidance says: a medical mask or a respirator, not just a medical mask. A respirator (aka N95/KN95/elastomeric) is a much better fitting mask than a surgical mask and will be much better protection when exposed to virus in aerosols. 3/ canada.ca/en/public-heal…
Why is considering a respirator important? The document specifically IDs fit as an important quality. It is worth noting Alberta has never recommended respirators for the public. And never for its staff, except in rare magical situations known as AGMPs 3/
This PCRA (point of care risk assessment) is supposed to allow HCWs to judge risk. But HCWs have never ever ever been told of the dangerous of airborne transmission or the factors that might make it more likely. How can they accurately assess risk without training? 4/
There are no other industries that would ask a worker to take responsibility for their own safety.Imagine a construction worker being told"decide if you need to wear a hard hat in this situation".Or an asbestos worker which situations to wear a mask with. esp. without training 5/
Reference please?
Vaccines are an important tool. One where those 5-11 won't be fully protected for a min. of 10 wks from now (2 doses 8 wks apart +2 wks). Why can't we better protect them until then? Remove mask exemptions. Allow filtration systems. Improve TTI. Allow mass rapid tests. fin/
Now read these great scicomm articles on airborne transmission.
cmaj.ca/content/193/26…

thelancet.com/article/S0140-…

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More from @jvipondmd

2 Dec
Here's your AB COVID # analysis for Wed Dec 1st. 1/
Yest cases/d 435 an 8.3% decr from last Tues's 474. 7d Avde now 320, a 14.9% drop wk over wk from 376 (yest 13.3%). Positivity 4.07% down from last wk's 4.58%. All leading indicators trending down, so good. 2/ ImageImageImage
Hospitalizations: inpts. Sat -8 to 368 (revised from 367 yest). Sun -8 to 360 (revised from 359 yest). Mon +1 to 361 (revised from 353 yest). Yest -16 to 345 (subj to revision). ICU -2 to 79. Paeds admits: None! Deaths 7 incl another 20-29 year old 3/ ImageImageImage
Read 8 tweets
1 Dec
This hot take is a dangerous bit of poor math. Neverymind that we don't actually know the data for Omicrom to inform this... 1/ smh.com.au/national/could…
even if it is more transmissible but less virulent, IT WILL STILL KILL MORE PEOPLE because more people get infected. This is the problem with exponential growth. 2/ theconversation.com/coronavirus-va… Image
but again, we don't know any of this. Avoid the Hopium. Use the precautionary principle until we know better. Then when we know better, do good science based planning. fin/
Read 4 tweets
1 Dec
Here's your AB COVID # analysis for Tues Nov 30th covering Fri/Sat/Sun/Mon, because. 1/
Cases/d Fri 335 a 28.1% drop from last Fri's 466. Sat 253 a 33.2% drop from 379. Sun 231 a 14.7% drop from 271. and Mon 239 a 12.5 % drop from 273. Four in a row of dropping cases, that's great news. 7d ave now 326 a 13.3% drop wk over wk from 376 (friday flat) 1/
Positivity Fri 4.56% (last Fri 5.13%) Sat 3.86%(5.10%) Sun 4.60%(5.76%) Mon 4.47%(5.30%). Another leading indicator with dropping numbers, a clean sweep. This, again, is so good. In fact, first substantial drop in 7d ave since Nov 1st. 2/
Read 9 tweets
30 Nov
Hey folks, long time no see. 1/
Hey so funny story. On Saturday a new fake twitter account popped up using my name and image. I thought oh, maybe I need to get a verified account now? So applied for one, only to find out I don't qualify (not enough followers they said). 2/
So I reported the new account, and mentioned in the report "by the way, there are multiple fake jvipond accounts". Yest at 4:40 was told my report had been acted on, and the offending account suspended.3/
Read 5 tweets
5 Oct
So, it's time for a long tweet thread on airborne transmission, and the resistance of AHS, AH, and Canadian IPAC (that's Infection Prevention and Control) to acknowledge the problem, and mitigate it, resulting in umpteen preventable illnesses and deaths. 1/
We've known from at least May 2020 (perhaps China recognized it in Jan '20) that COVID was primarily transmitted via airborne means, by inhaled aerosols. However, IPAC has been using an alternate concept known as contact/droplet (c/d). 2/ pnas.org/content/117/26…
As time has gone on, there has been increasing quality and quantity of scientific studies supporting airborne/aerosol transmission. It's quite irrefutable now. 3/
bmj.com/content/373/bm…
cmaj.ca/content/193/26…
thelancet.com/journals/lance…
Read 30 tweets

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