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Catherine Clase

@catherineclase.bsky.social
4.8K followers 1.7K following 761 posts

🏳️‍⚧️🏳️‍🌈🇵🇸 Professor, kidney doc, epidemiologist, editor, justice advocate, mask researcher maskevidence.org @docshumanity.bsky.social Opinions my own

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Reposted by Catherine Clase
Timothy Caulfield @caulfieldtim.bsky.social · 13h
🚨 Misinformation does real harm 🚨 1 in 5 young people in UK regret health decision based on misinformation medicalxpress.com/news/2026-09... 38% "knew someone who had suffered serious harm as a result of making a health decision based on false or misleading information."
medicalxpress.com
1 in 5 young people in UK regret health decision based on misinformation
A fifth of adults ages 18–34 in the U.K. have made a health decision they later regretted based on false or misleading information, according to a report from the London School of Hygiene & Tropical M...
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Catherine Clase @catherineclase.bsky.social · 2h
“Tucker said OHS officers wore N95 respirators and face shields for their own inspection that day, while workers were still issued only surgical masks” Cargill outbreak response a 'catastrophic failure,' report says | Canadian Occupational Safety www.thesafetymag.com/ca/news/gene...
thesafetymag.com
Cargill outbreak response a 'catastrophic failure,' report says
New Parkland Institute research finds Alberta regulators let COVID-19 spread unchecked at Cargill plant
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Reposted by Catherine Clase
Gender Liberation Movement @genderlib.com · 7h
Over a hundred protesters picketed NewYork-Presbyterian for ending care for trans youth. We're picketing a hospital on the first Thursday of each month through Pride. See you on the streets Nov. 5
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Reposted by Catherine Clase
Timothy Caulfield @caulfieldtim.bsky.social · 11h
Dear Alberta UCP, It is becoming increasingly clear that the MAGA movement will be remembered as an incredibly dark, dysfunctional, destructive, corrupt and unjust period in history. Why are you tethering your legacy – and our province – to this rotten and sinking ship?
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Reposted by Catherine Clase
Adam Serwer @adamserwer.bsky.social · 10h
“Between the Christianity of this land and the Christianity of Christ, I recognize the widest possible difference.” — Frederick Douglass bsky.app/profile/atru...
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Swapnil Hiremath 🍁🇨🇦 @hswapnil.medsky.social · 6h
Very cool Australian trial Triaging peeps coming to ER with a musculoskeletal complaint to be seen by a physiotherapist (versus usual care) gets people home faster and cheaper www.thelancet.com/journals/lan... in @thelancet.com with higher satisfaction and same safety #medsky
thelancet.com
Physiotherapist-led care for musculoskeletal conditions in the emergency department (RESHAP-ED): a randomised controlled trial with economic evaluation
A physiotherapist-led model of care in the emergency department reduced length of stay among patients presenting with uncomplicated musculoskeletal conditions, without compromising health outcomes or ...
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Catherine Clase @catherineclase.bsky.social · 19h
Petition for Canadians: call on Gov C to reaffirm Canada’s historic opposition to the United States embargo against Cuba at the United Nations and support the annual resolution on the Necessity of ending the economic, commercial and financial embargo. www.ourcommons.ca/petitions/en...
ourcommons.ca
Petition e-7649 - Petitions
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Margaret Killjoy @margaret.bsky.social · 30/09/2026
Reading, and writing, are holy. I love reading novels because they tell me something. They say: "this is what someone believed enough to dedicate months or years of their life to say." This is just as true for the trashiest pulp as it is for the highest literature.
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Transgender World @transgenderreport.com · 30/09/2026
Cheek Swabs? Genital Checks? Anti-Trans Sports Ban Proponents Don’t Know How It Would Be Enforced coloradotimesrecorde... #transgender #trans #LGBTQ #LGBTQIA
coloradotimesrecorder.com
Cheek Swabs? Genital Checks? Anti-Trans Sports Ban Proponents Don't Know How It Would Be Enforced
A ballot measure which purports to simply ban trans athletes from participating in sports could have further-reaching consequences for students regardless of gender, but you wouldn’t hear that from the...
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Reposted by Catherine Clase
Rabbi David Mivasair @mivasair.bsky.social · 29/09/2026
When will they arrest me? Tell Canada: Anti-Zionism is not Antisemitism. Use this link to write to our elected officials and share this widely: actionnetwork.org/letters/tell...
actionnetwork.org
Tell Canada: Anti-Zionism is not Antisemitism
Cliquez ici pour une version française de cette campagne. Last week, Public Safety Canada tried to quietly redefine anti-Zionism as antisemitic. This marks the first time the Canadian government has...
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Reposted by Catherine Clase
Chaucer Doth Tweet @levostregc.bsky.social · 29/09/2026
Innovation ys not just tech. For a bettir future we need poetrye, creativitye, historical studye, love of languages, dreames, dialogues, new storyes, & intellectual curiositye. We must fund & expand higher educacioun yn HEART: H umanityes E thiques A rtes R hetorique & the crafte of T eaching
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United Farm Workers @ufw.bsky.social · 19/09/2026
"Lupe" shares, "Today's my first day harvesting grapes at night. I had to buy my own gloves, scissors, and flashlight because the foreman told me the crew was full, but he'd make an exception if I bought my own tools. What I earned today will go towards these costs." #WeFeedYou
Worker harvesting wine grapes at night
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Catherine Clase @catherineclase.bsky.social · 29/09/2026
Today on campus #hamont All welcome
Partition film with author q&a
5pm hamilton hall on campus
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Reposted by Catherine Clase
Mark Ungrin @mark-ungrin.bsky.social · 28/09/2026
An absolutely damning report on the unnecessary COVID deaths of workers at the Cargill plant in High River, AB, highlighting public health and infection control's mismanagement of the crisis, and failure to engage OHS or follow the precautionary principle. albertapolitics.ca/wp-content/u...
As the evidence marshalled in this report shows, the massive
outbreak associated with Cargill was by no means inevitable. It
occurred because systems designed to protect worker health and
safety failed. And they failed for a number of interrelated reasons.
OHS and AHS Did Not Adopt the
Precautionary Principle
The virus SARS-CoV-2 is spread among humans via aerosol
transmission. The period during which someone with COVID-19
can transmit the virus varies depending on factors such as the
variant and severity of illness, but transmission can occur both
before and after symptom onset. Some infected individuals never
experience illness but still spread the virus to others.
At the beginning of the pandemic, Hinshaw and many other
public health leaders believed that COVID-19 only spread via
large droplets and that asymptomatic transmission was not
occurring. As a result, AHS EPH primarily focused on physical
barriers, physical distancing, hand-washing, and surgical masks as
preventative measures at Cargill.Cargill, AHS, and OHS did not consider the possible range of
aerosol transmission of the virus in a large crowded industrial
work setting and, therefore, did not prioritize — let alone consider
— higher-level control measures such as improved ventilation, air
filtration, and N95 (or equivalent) respirators.
Surgical masks, which were made mandatory at Cargill after April
16, provided inferior protection to workers working eight hours a
day, especially for those working in close quarters with inadequate
ventilation. Sometime between the closure of the facility (April
22) and its reopening (May 4), Alberta OHS came to believe that
tight-fitting, higher-filtration respirators (N95 or equivalent
masks) were required, as demonstrated by the ministerial order
approving KN95 masks (May 3) and OHS officers’ decision to wear
N95 masks during their May 4 inspection. However, the evidence
suggests that this view was not shared by Hinshaw.
Ventilation was not identified as a potential factor in the spread
at Cargill until early May, and even then, there is no evidence that
this pathway was further investigated by AHS or OHS.
Had OHS, AHS, and Cargill adopted the precautionary principle,
which requires taking proactive measures to maximize human
safety before the science about the transmission of a new virus
is known, more aggressive control measures would have been
adopted early on. If improved ventilation, provision of N95 masks
(or cartridge respirators), and other actions had been taken earlier,
hundreds of workers may have been spared from illness.None of the evidence we reviewed showed any communication
or coordination between AHS EPH officials and Alberta OHS at
this time. In response to our freedom of information requests for
email correspondence between the manager for OHS in Calgary
and several AHS officials who were directly involved in the Cargill
response, we were informed by the Government of Alberta’s
access to information that “a thorough search […] did not yield any
records responsive to your request.”195
By April 16, the total number of known confirmed positive cases
had reached approximately 550. At this point, there had only
been one in-person inspection of the plant, that being AHS’ April
7 visit, which resulted in non-binding recommendations. And, as
mentioned, there was no epidemiological analysis of the outbreak
showing the temporal pattern of the spread within the plant and
in the community.
An internal AHS MOH update on April 17 noted that “84% of
new COVID-19 cases [in the province] are in Calgary Zone, ‘most
related to Cargill.”196 By this time, a Cargill worker and union shop
steward had been admitted to an ICU. On April 18, another worker
would need life support care in the ICU. Cargill, AHS, and OHS had
lost control of the outbreak.Echoing Cargill’s response to the union’s April 12 letter, Dreeshen
cautioned workers not to listen to “inflammatory rhetoric” and
appealed to them to instead focus on information from public
health experts:
“…On this call are Alberta’s best medical minds and
they provide Alberta’s government with the best up
to date information on a daily basis and I would just
like to encourage everyone to not get distracted by
misleading noise or inflammatory rhetoric because
any government's primary goal — our core goal — is
to keep our people safe…”
Immediately after the town hall, Dreeshen posted on his social
media: “Directly communicated with [Cargill] workers to reassure
them that their worksite is safe.”217 Internal email messages
among senior officials with the Ministry of Agriculture and
Forestry suggest there was also “a request” to share some “key
messages” about the safety of Cargill’s plant through Hinshaw’s
Twitter account.218
Hours after the town hall, Dr. Nick Etches, acting lead medical
officer of health for the Calgary Zone, wrote to colleagues
requesting assistance with an epidemiological analysis of
the outbreak:
“[Hu] just spoke with [Hinshaw] and she wants us
to answer some questions that will likely require
additional epi support. Essentially we want to
determine the proportion of the Cargill-associated
cases that are due to:
1) Workplace transmission
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Catherine Clase @catherineclase.bsky.social · 29/09/2026
“Alexa, find me a fair contract” Italy Shows How Amazon Can Be Forced to Bargain: Shut Down Its Distribution | Truthout truthout.org/articles/ita...
truthout.org
Italy Shows How Amazon Can Be Forced to Bargain: Shut Down Its Distribution
Amazon is huge and powerful, but Italian workers have shown it can be forced to negotiate. Could US workers do the same?
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Catherine Clase @catherineclase.bsky.social · 28/09/2026
We need unions to show up for justice around the world Palestinian Unions: Global Call for Worker Action Against Genocide this November | BDS Movement bdsmovement.net/news/Palesti...
bdsmovement.net
Palestinian Unions: Global Call for Worker Action Against Genocide this November
Summary: The Palestinian labor movement reiterates its solidarity with workers across the world resisting all forms of oppression and calls for global action to end complicity in Israel's ongoing geno...
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Catherine Clase @catherineclase.bsky.social · 28/09/2026
Reposting - still relevant. Sadly
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Reposted by Catherine Clase
George Monbiot @georgemonbiot.bsky.social · 28/09/2026
It's not just that we had two wasted years under Keir Starmer - years in which, with a vast majority and quite a lot of goodwill - he could have turned this country around. On crucial issues, we had two years of spiralling backwards, towards a very dark place. 🧵 www.theguardian.com/politics/202...
theguardian.com
Ed Miliband to acknowledge Labour’s former stance on Palestine fell short
Foreign secretary will tell party’s conference ‘we are not here to accept the status quo but to change it’
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Catherine Clase @catherineclase.bsky.social · 27/09/2026
www.theguardian.com/film/2026/se...
theguardian.com
NAZA film-makers address threats at documentary’s New York City premiere
Yuval Abraham and Rachel Szor defend findings on Israel’s killing of Palestinians amid threats from Israeli officials
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Catherine Clase @catherineclase.bsky.social · 26/09/2026
Sat Sept 26th (today at time of posting) 2-4pm Fundraiser for pediatric hospital in Cuba #Hamont
Workers Art and Heritage Centre, 51 Stuart St Hamilton ON
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Catherine Clase @catherineclase.bsky.social · 26/09/2026
Prescribing vaccines should be as routine as prescribing statins or blood pressure meds. Every healthcare worker has a role in renormalizing vaccination. Don't be apologetic. Speak to your patients and clients from your knowledge. Worst thing that happens is they turn you down.
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Reposted by Catherine Clase
Jonathan Douglas PhD CPsych @jonathanconp.bsky.social · 26/09/2026
www.thestar.com/news/gta/ont...
thestar.com
Ontario is launching free flu and COVID-19 shots next week as vaccination rates decline
Starting Sept. 28, high-risk individuals, including hospital patients and workers, long-term care residents and staff, and people aged 65 and older will be able to get flu and COVID-19 shots.
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Reposted by Catherine Clase
Jenny Kwan @jennykwan.bsky.social · 26/09/2026
2./C-233 was about a simple principle: Canada’s arms export rules should mean what they say. I thank the MPs who supported the bill—including Sean Casey—for standing up for stronger accountability and respect for Canada’s export-control regime. Parliament must be able to hold government to account.
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Jenny Kwan @jennykwan.bsky.social · 25/09/2026
1/A Parl Secretary should be able to vote according to their conscience. Sean Casey supported my C-233, which sought to close a loophole in Canada’s arms export controls. If MPs face consequences for exercising independent judgment, what does a “free vote” actually mean? www.cbc.ca/lite/story/9...
cbc.ca
Liberal MP says he was demoted for supporting NDP bill targeting arms export controls
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ProPublica @propublica.org · 24/09/2026
A maternity ward doctor donated his own blood during surgery to keep a pregnant patient alive. One woman gained fewer than 10 pounds over her entire pregnancy. Another collapsed and had seizures during labor. (Published Dec. 2025)
propublica.org
What I Saw at a Maternity Ward in Kenya After the U.S. Cut Off Food and Foreign Aid
Photographs tell a story of two mothers determined to help their babies gain enough weight to leave the hospital — only to face little to no food again.
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Catherine Clase @catherineclase.bsky.social · 24/09/2026
Someone in my neighborhood keeps stealing my lawn sign So I keep replacing it Remembering Hind Rajab and at least 21,000 other children killed by Israel since 2023 440 school buses parked end to end stretches for 5 km. Think about those frightened agonizing deaths & join us
‘Ford failed you’ sign next to ‘this is hind Rajab sign, in an overgrown pollinator garden’ @mivasair.bsky.social @mark-carney.bsky.social #hamont
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Di @jupiterdi.bsky.social · 24/09/2026
I had a most wonderful experience in University. I went at night for years because of working. By chance I took a Humanities course that opened the world to me. Three amazing professors that taught Comparative Literature, Politics and Religion through each age. It was life changing.
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Reposted by Catherine Clase
Josh Chafetz @joshchafetz.bsky.social · 24/09/2026
The more we buy into the logic that academia needs to be more like "the real world"--the more we buy into the idea that all we're doing is training students to go out and be good workers--the less we are fulfilling any sort of distinct mission, and the less exciting our work is our students.
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Catherine Clase @catherineclase.bsky.social · 24/09/2026
The primary problem “Gaza remains gripped by a severe water and sanitation crisis. The Palestinian territory is plagued by rodents, and sewage floods its coastline after Israel destroyed its wastewater treatment plants” “Israel destroyed” 🇨🇦Cancel CIFTA Petition www.ourcommons.ca/petitions/en...
ourcommons.ca
Petition e-7694 - Petitions
Only validated signatures are counted towards the total number of signatures.
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Mayor Zohran Kwame Mamdani @mayor.nyc.gov · 24/09/2026
Never been to the opera before? Now’s your chance. We’re giving away 70,000 free tickets to the @metopera at the iconic Lincoln Center. Go to on.nyc.gov/opera to enter the lottery. There’s not a bad seat in the house.
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🇨🇦 Kari Raymer Bishop @kariraymerbishop.bsky.social · 24/09/2026
I was flabbergasted to see @citykitchener.bsky.social staff destroying the naturalized garden in front of Huron NATURAL Area this morning ahead of the FOREST Festival. The irony is ridiculous. Someone needs to answer for this.
Natural area mowed down to dirt, branches strewn about.
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Medievalist.net @medievalists.bsky.social · 24/09/2026
From Cradle to Choir: Music in the Lives of Medieval Children www.medievalists.net/2025/09/musi... #MedievalMusic
medievalists.net
From Cradle to Choir: Music in the Lives of Medieval Children - Medievalists.net
What songs did medieval children grow up with? From soothing lullabies sung by mothers to the first lessons at cathedral song schools, music was an essential part of childhood in the Middle Ages.
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edeath @edithcharles.bsky.social · 09/10/2023
Trans people deserve youth. Trans people deserve old age.
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World Health Network @thewhn.bsky.social · 22/09/2026
Steven Spielberg wears a respirator while being interviewed outside the opening of the Lucas Museum of Narrative Art on September 19, 2026. Respiratory protection doesn’t have to be unusual or disruptive. For many people, it remains a simple, everyday way to reduce the risk of airborne (...)
A man with gray hair and glasses, wearing a black filtering facepiece respirator and a dark suit, speaks into a handheld microphone outdoors. The WHN Global logo appears at the top left. Large text reads: “Steven Spielberg is still masking in 2026.” Smaller text at the bottom reads: “Steven Spielberg, interviewed outside at the opening of the Lucas Museum of Narrative Art on September 19, 2026, wearing a respirator.”
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Catherine Clase @catherineclase.bsky.social · 23/09/2026
Protest Battlefield International selling fluid connectors to Elbit. Less than 1% of their business: just stop Elbit Systems is Israel's largest defence contractor Israel is perpetrating genocide in Gaza- UN, Amnesty, B'Tselem, Human Rights Watch Thursday Sept 24 4.30-6pm DM me for details #HamOnt
Protest Battlefield International selling fluid connectors to Elbit. Less than 1% of their business.

Thursday Sept 24
4.30 - 6pm
DM me for details
#HamOnt
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Catherine Clase @catherineclase.bsky.social · 23/09/2026
Partition film screening 5-7pm Tuesday Sept 29 Q&A with filmmaker Diana Allan McMaster University Hamilton Hall Room 305 Community members most welcome #HamOnt
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Catherine Clase @catherineclase.bsky.social · 23/09/2026
#hamont
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Catherine Clase @catherineclase.bsky.social · 23/09/2026
From University of Chicago’s Climate Impact Lab
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Reposted by Catherine Clase
ASN Publications @asnpublications.bsky.social · 22/09/2026
Kate M. Denton, PhD, one of the Top 5 #ASNJASN reviewers of 2026, noted: “Peer review is the backbone of scientific progress. Rigorous critique is what transforms data into trustworthy knowledge.” Thank you, Dr. Denton for your contributions! #PRW2026
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Catherine Clase @catherineclase.bsky.social · 21/09/2026
Partition: film screening and Q&A with filmmaker & anthropologist Diana Allan. Tuesday 29 Sept at 5-7pm on campus: Hamilton Hall (HH), room 305. Everyone welcome Campus map here: discover.mcmaster.ca/map/ Visitor Parking Lots: A, B, C, D, E, G, H, I, M, P, and Q
Still of a person, in the distance, at the crest of a hill or dune, sitting on a horse. "Partition fuses archival footage from the British occupation of Palestine with audio recorded of Palestinian refugees in Lebanon." @McMasterU #BrighterWorld
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Catherine Clase @catherineclase.bsky.social · 21/09/2026
Donate to the last children’s hospital in Gaza Funding crisis: without your help funds run out at the end of the September www.uossm-canada.org/gaza
uossm-canada.org
Gaza Crisis & Response | UOSSM Canada
Help UOSSM Canada deliver urgent medical aid, humanitarian aid, and nutrition support to vulnerable families in Gaza. Donate now.
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Reposted by Catherine Clase
Stellbound: Stellraiser II @antlervel.vet · 20/09/2026
Too many have forgotten that the civil rights movement was fought over, among other things, bathrooms and locker rooms
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Medievalist.net @medievalists.bsky.social · 20/09/2026
Swedish Migration Reshaped Medieval Finland’s Genetic Landscape, Study Finds www.medievalists.net/2026/09/swed... #Finland #Migration
medievalists.net
Swedish Migration Reshaped Medieval Finland’s Genetic Landscape, Study Finds - Medievalists.net
Ancient DNA reveals how medieval Swedish migration reshaped coastal Finland while uncovering extensive Viking-Age connections across the Baltic Sea
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Catherine Clase @catherineclase.bsky.social · 20/09/2026
There are some great plain language summaries of important research on this website
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SadCrit @schistosomnia.bsky.social · 19/09/2026
Overloaded post-op patient in "deresuscitation phase". Boss wants to offload with albumin and furosemide together, then notices a "loop diuretic allergy", so opts for just the albumin. This makes no sense, right?! #nephsky #emimcc
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Glass Half Empty 🇨🇦 @yulnative.bsky.social · 19/09/2026
Yes, indeed. @mark-ungrin.bsky.social has tirelessly tried to get PH leadership to learn something from COVID. Bon courage.
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Prof Nisreen Alwan @nisreenalwan.bsky.social · 19/09/2026
Sexism is still engrained in almost everything to do with our systems. www.theguardian.com/science/2026...
theguardian.com
Women with same health conditions as men ‘less likely to be offered active treatment’
Men with heart, kidney or liver conditions more likely to be offered intervention compared with women, global analysis finds
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Paul F. Tompkins @pftompkins.bsky.social · 19/09/2026
It’s very simple and it’s been said over and over but I guess it needs saying continuously: if you deem one group too small to have equal rights you are enabling fascism, not fighting it. The people saying Dems are GREAT on trans rights are not paying attention and/or saying stuff like this.
Nichole Hiltz
The Democrats defend the Kennedy Center but not trans people.
A building.

@treewarrior.bsky....
maybe because defending everything about a super small minority of the population is not worth losing to fascists
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Charlie Angus @charlieangus104.bsky.social · 19/09/2026
See you in Orillia tonight. The @meidascanada.ca townhalls are on the road.
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Catherine Clase @catherineclase.bsky.social · 19/09/2026
Amazing and meaningful accomplishment. So much evidence. Ending genocide as soon as possible is the priority: keep the pressure up on complicit companies and governments #BDS
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