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Tracy Casavant Oh, BASc (Chml), MES Profile picture
@OhCasavant
Jan 24, 2023 • 4 tweets • 3 min read • Read on X
As of today, @WorkSafeBC has allowed 15,027 #LongCovid claims. FIFTEEN THOUSAND.

This excludes more than 2,000 disallowed claims, and, of course, thousands of Long COVID cases, including in children, not linkable to workplace infection.

#bced #bcpoli Image
The Healthcare & Social Services and Education sectors are by far responsible for most of the claims.

Guess what? There is no way in hell workers are getting infected in healthcare & education workplaces, but the public- inc babies & kids, seniors, immunocompromised - are not 🤬 Image
Building eng'g controls, integrated w/ source control & PPE (i.e., masks!), would make workplaces more safe & reduce worker exposure to an airborne, RG3 biopathogen. Yet, despite being reg'd as Engineering Firm, no PEng worked on Worksafe COVID safety!

Image descriptions:

Tweet 1: Bar chart monthly Long COVID claims

Tweet 2: Screenshot of first few rows of table, claims per industry, showing healthcare & education as top 2.

Source: worksafebc.com/en/covid-19/cl…

Tweet 3: Screenshot of Worksafe letter confirming no PEng involved

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More from @OhCasavant

Tracy Casavant Oh, BASc (Chml), MES Profile picture
May 29
1/ For years (oh, god, it has been years) every request for scientifically & ethically sound COVID action has been met with denial and "We follow Bonnie Henry."

Now, I was taught that even the Queen herself (now King) could not direct a P.Eng to abandon ethics.

So ...

🧵
2/ @PHSAofBC runs @CDCofBC. BC CDC guidance is ref'd everywhere. So, I asked CEO.

"...help me to understand the legal roles and responsibilities for healthcare PPE decisions in BC? It's unclear when one considers PHO, PHSA itself, BCCDC...PicNet, and Worksafe BC." Dear Dr Byres: Hospital workers in patient contact roles are not currently mandated to wear N95 respirators, the appropriate PPE for a bioaerosol hazard such as COVID. The relevant national standard (CAN/CSA-Z94.4-18) requires N95 respirators be issued to, and worn by, all workers in healthcare environments where COVID may be present. Can you please help me to understand the legal roles and responsibilities for healthcare PPE decisions in BC? It's unclear when one considers PHO, PHSA itself, BCCDC (which is only a program of PHSA, not a separate legal entity) each health authority (which do...
3/
"..direction on Infection Prevention Control... incl COVID-19, is informed by Office of PHO and set by Ministry of Health...B.C. health authorities are equally accountable to Ministry of Health..."

[Hmmm. But @adriandix says he defers to Bonnie, not other way around] Thank you for reaching out. Within the province of British Columbia, direction on Infection Prevention Control Measures for viral respiratory illnesses, including COVID-19, is informed by the Office of Provincial Health Officer and set by the Ministry of Health. This direction is communicated to all public sector health organizations – including PHSA and the regional health authorities – via written policy communiqués, which PHSA makes publicly available on the BCCDC website. The most current version of the direction in question is available here<http://www.bccdc.ca/Health-Professionals-Sit...
Read 23 tweets
Tracy Casavant Oh, BASc (Chml), MES Profile picture
May 8
1/ Is this sufficient evidence of willful negligence? Were healthcare workers in BC, across Canada, around the world?

A chronological walk through some evidence.

Feb 2020
Unions request airborne protection.
@govcanhealth & IPAC /ID gang say not needed.


Image
2/ Mar 2020.

Health Services Association of BC union (@hsabc) presents report from
Dr. John H. Murphy
BSc MHSc MBA PhD ROH CIH (🔥)
Principal - REA Group
Adjunct Professor - Occupational & Environmental Health, University of Toronto DLSPH

hsabc.org/sites/default/…
The first page of the linked report, showing the date as Mar 19, 2020. It was addressed to President of HSABC.
3/ The Mar 2020 Murphy report is very detailed. Dr Murphy 'knows his stuff' re: aerosol transmission and the implications for HCW and patient safety, even this early in the pandemic.

It's a great read:


Dr Henry said no to @hsabc request. hsabc.org/sites/default/…
First two paragraphs from the linked report from the section titled The "Controversy" Over Aerosol Transmission
Read 21 tweets
Tracy Casavant Oh, BASc (Chml), MES Profile picture
Apr 5
1/ So, I got curious about hybrid immunity, which seems to have been discovered only for SARS-CoV-2 (COVID).

I asked a bunch of experts - can we acquire measles hybrid immunity? If so, is that then a good public health goal?

🧵
2/ Text of my inquiry (1)

I understand that two doses of the measles vaccine are very effective; in fact, even one dose seems fairly protective. Nonetheless, the US CDC indicates about “3 out of 100 people with two doses of MMR vaccine will get measles if exposed to the virus”,
3/ Text of my inquiry (2)

...so non-zero odds ()cdc.gov/vaccines/vpd/m…
Read 10 tweets
Tracy Casavant Oh, BASc (Chml), MES Profile picture
Mar 12
1/ NEW from an excellent team inc @DavidElfstrom!

COVID-19 outbreak at a residential apartment building in Northern Ontario, Canada

#COVIDisAirborne

cambridge.org/core/journals/…
2/ "A professional engineer assessed the building’s HVAC systems. Whole genome sequencing and an in-depth genomic analysis were performed. Forty-five outbreak confirmed cases were identified."
cambridge.org/core/services/…
3/ "...being on the upper floors...or within three adjacent vertical lines...were both significantly associated with being a case of COVID-19...A single genomic cluster was identified...Findings are suggestive of aerosol transmission ➡️between⬅️ units."
cambridge.org/core/services/…
Read 5 tweets
Tracy Casavant Oh, BASc (Chml), MES Profile picture
Jan 27, 2023
So, if VSB doesn't ref the Ventilation Guidance developed by Min of Ed Ventilation Technical Advisory Panel, what does it reference?

This thread will provide a quick overview of the, um, ecosystem of references shown below: image showing which how doc...
VSB Ventilation Page
vsb.bc.ca/page/5017/vent…

Refers to
“MERV-13 as recommended by Min of Ed”
VCH: FAQ on Ventilation and Portable Air Cleaners - Jan 12, 2022
COVID-19 Updates page (which refs VSB Communicable Disease Plan) Header from ventilation page
VSB Communicable Disease Plan
sbvsbstorage.blob.core.windows.net/docs/b5e893b8-… Communicable Disease Prevention Plan V10.pdf Image of cover of Communica...
Read 18 tweets
Tracy Casavant Oh, BASc (Chml), MES Profile picture
Jan 27, 2023
1/ I submitted an FOI request to BC Ministry of Education for documents related to the Ventilation Technical Advisory Panel (VTAP) From 9/1/2021 To 8/31/2022.

Response is 333 pp! I will slowly post results & thread the threads here. We are all volunteers wading through this... Image
2/ The FOI package included a scanned black & white version of the Min of Ed HVAC Guidance (the Aug 8 version. The version below was updated Dec 13, 2022 🧐

www2.gov.bc.ca/assets/gov/edu…
3/ "This document is intended to provide some considerations to school districts with regards to improving HVAC system performance given the recent pandemic situation.
Note that this document is not intended to supersede any requirements from ASHRAE or other regulatory bodies."
Read 8 tweets

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