Catherine Clase
@catherineclase.bsky.social
Professor of medicine, kidney doc, epidemiologist, editor, mask researcher and advocate (airborne)
@docshumanity.bsky.social
Opinions my own
https://www.doctorshumanity.org/petition
https://maskevidence.org
@docshumanity.bsky.social
Opinions my own
https://www.doctorshumanity.org/petition
https://maskevidence.org
Pinned
The idea that 'cloth masks are good only for droplets' still circulates. Many have said this, but it is wrong.
Recommendations about cloth masks, from spring 2020, were based on aerosol evidence
www.acpjournals.org/doi/10.7326/...
#WearTheBestMaskAvailable
1/14
Recommendations about cloth masks, from spring 2020, were based on aerosol evidence
www.acpjournals.org/doi/10.7326/...
#WearTheBestMaskAvailable
1/14
Join Amnesty International in demanding the immediate release of Sonia Dahmani and an end to her cruel treatment. Sonia is a courageous Tunisian lawyer and human rights defender, has been jailed for speaking out against injustice.
takeaction.amnesty.ca/page/178194/...
takeaction.amnesty.ca/page/178194/...
Write for Rights: Demand the Release of Human Rights Defender Sonia Dahmani!
Demand the immediate release of Sonia Dahmani and an end to her cruel treatment, as she is being held in rat-infested conditions without proper medical care. Sonia is a courageous Tunisian lawyer and ...
takeaction.amnesty.ca
November 17, 2025 at 10:24 PM
Join Amnesty International in demanding the immediate release of Sonia Dahmani and an end to her cruel treatment. Sonia is a courageous Tunisian lawyer and human rights defender, has been jailed for speaking out against injustice.
takeaction.amnesty.ca/page/178194/...
takeaction.amnesty.ca/page/178194/...
Canadians and trans-allies with Canadian followers: I just signed this important petition reaffirming Canada as a safe haven for 2SLGBTQIA+ refugees. Will you join me; will you share this post?
www.ourcommons.ca/petitions/en...
www.ourcommons.ca/petitions/en...
Sign this Petition - Petitions
www.ourcommons.ca
November 17, 2025 at 8:48 PM
Canadians and trans-allies with Canadian followers: I just signed this important petition reaffirming Canada as a safe haven for 2SLGBTQIA+ refugees. Will you join me; will you share this post?
www.ourcommons.ca/petitions/en...
www.ourcommons.ca/petitions/en...
Reposted by Catherine Clase
“The rise in high-fronted SUVs poses a clear and growing threat to public safety, especially for children,” states the report. “With no benefit to society, it’s time for lawmakers at all levels to act.” Via @carltonreid.com in @forbes.com.
Cap SUV/truck hood heights. And ban unsafe designs.
Cap SUV/truck hood heights. And ban unsafe designs.
EU Must Cap SUV Hood Heights Urges Report. Crash Test Body Says Not As Simple As That
Higher fronts on cars significantly increase the death rate when pedestrians and cyclists are struck, says new report. EuroNCAP says more complex than that.
www.forbes.com
November 15, 2025 at 7:18 AM
“The rise in high-fronted SUVs poses a clear and growing threat to public safety, especially for children,” states the report. “With no benefit to society, it’s time for lawmakers at all levels to act.” Via @carltonreid.com in @forbes.com.
Cap SUV/truck hood heights. And ban unsafe designs.
Cap SUV/truck hood heights. And ban unsafe designs.
Reposted by Catherine Clase
Here’s something that’s really important for everyone to understand.
If we design our cities just for cars, they fail everyone, including drivers.
If we design our cities with many great CHOICES in how to get around, they work better for everyone, including drivers.
Spread the word.
If we design our cities just for cars, they fail everyone, including drivers.
If we design our cities with many great CHOICES in how to get around, they work better for everyone, including drivers.
Spread the word.
November 15, 2025 at 9:14 AM
Here’s something that’s really important for everyone to understand.
If we design our cities just for cars, they fail everyone, including drivers.
If we design our cities with many great CHOICES in how to get around, they work better for everyone, including drivers.
Spread the word.
If we design our cities just for cars, they fail everyone, including drivers.
If we design our cities with many great CHOICES in how to get around, they work better for everyone, including drivers.
Spread the word.
Reposted by Catherine Clase
Just gonna keep saying it: There is no point growing the pie if the wealthy keep eating all of it.
November 13, 2025 at 7:16 PM
Just gonna keep saying it: There is no point growing the pie if the wealthy keep eating all of it.
“The fundamental problem is this: that most of the means of communication are owned or influenced by the very rich…
1/2
www.theguardian.com/commentisfre...
1/2
www.theguardian.com/commentisfre...
Dark forces are preventing us fighting the climate crisis – by taking knowledge hostage | George Monbiot
The fundamental problem is this: that most of the means of communication are owned or influenced by the very rich, says Guardian columnist George Monbiot
www.theguardian.com
November 15, 2025 at 6:28 AM
“The fundamental problem is this: that most of the means of communication are owned or influenced by the very rich…
1/2
www.theguardian.com/commentisfre...
1/2
www.theguardian.com/commentisfre...
Reposted by Catherine Clase
🎥 Explore the onconephrology case presentation series on the ISN Academy, in collaboration with ASON.
Tackle real-world challenges in cancer & kidney care.
📌 Latest case: Onco-hypertension
👉academy.theisn.org/o...
Tackle real-world challenges in cancer & kidney care.
📌 Latest case: Onco-hypertension
👉academy.theisn.org/o...
November 15, 2025 at 6:00 AM
🎥 Explore the onconephrology case presentation series on the ISN Academy, in collaboration with ASON.
Tackle real-world challenges in cancer & kidney care.
📌 Latest case: Onco-hypertension
👉academy.theisn.org/o...
Tackle real-world challenges in cancer & kidney care.
📌 Latest case: Onco-hypertension
👉academy.theisn.org/o...
Reposted by Catherine Clase
Ich wisshe Ich koude clearlye communicate to my cat that the litel guy doth literallye make lyfe worth livinge everye daye. Ich wisshe Ich koude let hym knowe.
November 15, 2025 at 4:22 AM
Ich wisshe Ich koude clearlye communicate to my cat that the litel guy doth literallye make lyfe worth livinge everye daye. Ich wisshe Ich koude let hym knowe.
Reposted by Catherine Clase
Just got back from the federal building in downtown San Diego where our local bishop and other church leaders were leading a vigil for the immigrants unjustly incarcerated there. The leadership the church has shown on this issue is inspiring.
Good statement from the US conference of Catholic Bishops
November 14, 2025 at 4:39 AM
Just got back from the federal building in downtown San Diego where our local bishop and other church leaders were leading a vigil for the immigrants unjustly incarcerated there. The leadership the church has shown on this issue is inspiring.
Special CLOSED SESSION of Hamilton City Council called for next Tuesday.
Council is, for reasons not disclosed, taking urgent training regarding gender-based violence.
The announcement states training will be behind closed doors. #yhmcc
Council is, for reasons not disclosed, taking urgent training regarding gender-based violence.
The announcement states training will be behind closed doors. #yhmcc
November 12, 2025 at 4:39 AM
Reposted by Catherine Clase
Read my statement on IDF soldiers platformed at Canadian universities here: www.heathermcpherson.ca/statement_on...
November 10, 2025 at 2:56 AM
Read my statement on IDF soldiers platformed at Canadian universities here: www.heathermcpherson.ca/statement_on...
Black Canadian KN95 with excellent breathability, foam seal over the nose, and overhead elastic
Available in Canada 19 Nov @canadastrong.bsky.social canadastrong.ca
Also Canadian, also black with overhead elastic, the Vitacore Can99 (N95/N99 respirator standard)
shop.vitacore.ca/products/can...
Available in Canada 19 Nov @canadastrong.bsky.social canadastrong.ca
Also Canadian, also black with overhead elastic, the Vitacore Can99 (N95/N99 respirator standard)
shop.vitacore.ca/products/can...
November 6, 2025 at 6:40 PM
Black Canadian KN95 with excellent breathability, foam seal over the nose, and overhead elastic
Available in Canada 19 Nov @canadastrong.bsky.social canadastrong.ca
Also Canadian, also black with overhead elastic, the Vitacore Can99 (N95/N99 respirator standard)
shop.vitacore.ca/products/can...
Available in Canada 19 Nov @canadastrong.bsky.social canadastrong.ca
Also Canadian, also black with overhead elastic, the Vitacore Can99 (N95/N99 respirator standard)
shop.vitacore.ca/products/can...
Reposted by Catherine Clase
CanadaStrong.ca is our exclusive distributor for Canada. Coming there soon: Nov 19-20.
November 6, 2025 at 2:55 PM
CanadaStrong.ca is our exclusive distributor for Canada. Coming there soon: Nov 19-20.
Black Canadian kn95 with excellent breathability, foam seal over the nose, and overhead elastic
Not available to ship to Canada
What’s going on, @breatheteq.bsky.social?
Also Canadian, also black with overhead elastic, the Vitacore Can99 does ship to Canada:
shop.vitacore.ca/products/can...
Not available to ship to Canada
What’s going on, @breatheteq.bsky.social?
Also Canadian, also black with overhead elastic, the Vitacore Can99 does ship to Canada:
shop.vitacore.ca/products/can...
November 6, 2025 at 5:07 AM
Black Canadian kn95 with excellent breathability, foam seal over the nose, and overhead elastic
Not available to ship to Canada
What’s going on, @breatheteq.bsky.social?
Also Canadian, also black with overhead elastic, the Vitacore Can99 does ship to Canada:
shop.vitacore.ca/products/can...
Not available to ship to Canada
What’s going on, @breatheteq.bsky.social?
Also Canadian, also black with overhead elastic, the Vitacore Can99 does ship to Canada:
shop.vitacore.ca/products/can...
Middle East Studies Association and American Association of University Professors: report on US govt investigations into universities
"According to the report, only 1 of 102 antisemitism complaints the authors reviewed raises antisemitism claims unrelated to criticism of Israel."
shorturl.at/xUeBz
"According to the report, only 1 of 102 antisemitism complaints the authors reviewed raises antisemitism claims unrelated to criticism of Israel."
shorturl.at/xUeBz
Surge in antisemitism investigations at US universities after October 7 attacks, data shows
A report shared exclusively with the Guardian documents how a civil rights law has become a tool to impose ideological priorities on US schools
www.theguardian.com
November 6, 2025 at 4:44 AM
Middle East Studies Association and American Association of University Professors: report on US govt investigations into universities
"According to the report, only 1 of 102 antisemitism complaints the authors reviewed raises antisemitism claims unrelated to criticism of Israel."
shorturl.at/xUeBz
"According to the report, only 1 of 102 antisemitism complaints the authors reviewed raises antisemitism claims unrelated to criticism of Israel."
shorturl.at/xUeBz
Open letter to President Van Acker, University of Guelph
On November 5, U of G is allowing an event titled “Voices of IDF,” organized by Students Supporting Israel (SSI), featuring two Israeli Defense Forces (IDF) soldiers.
Call for cancellation:
shorturl.at/2zbA9
On November 5, U of G is allowing an event titled “Voices of IDF,” organized by Students Supporting Israel (SSI), featuring two Israeli Defense Forces (IDF) soldiers.
Call for cancellation:
shorturl.at/2zbA9
Open letter to President Rene Van Acker, University of Guelph, from Doctors for Humanity
On November 5th, the University of Guelph is allowing an event titled “Voices of IDF,” organized by Students Supporting Israel (SSI), featuring two Israeli Defense Forces (IDF) soldiers.
Ask Universi...
shorturl.at
November 5, 2025 at 9:02 PM
Open letter to President Van Acker, University of Guelph
On November 5, U of G is allowing an event titled “Voices of IDF,” organized by Students Supporting Israel (SSI), featuring two Israeli Defense Forces (IDF) soldiers.
Call for cancellation:
shorturl.at/2zbA9
On November 5, U of G is allowing an event titled “Voices of IDF,” organized by Students Supporting Israel (SSI), featuring two Israeli Defense Forces (IDF) soldiers.
Call for cancellation:
shorturl.at/2zbA9
Reposted by Catherine Clase
November 5, 2025 at 4:58 PM
Reposted by Catherine Clase
Reposted by Catherine Clase
👇
I think maybe people want to vote for good people?
November 5, 2025 at 3:35 AM
👇
"...more than 30 million people now need urgent humanitarian assistance" You can donate here: www.uossm-canada.org/sudan
"That arsenal [RSF's], and therefore the calamity in El Fasher and the wider Darfur region, is sponsored by the United Arab Emirates."
www.theguardian.com/commentisfre...
"That arsenal [RSF's], and therefore the calamity in El Fasher and the wider Darfur region, is sponsored by the United Arab Emirates."
www.theguardian.com/commentisfre...
Donate to Sudan
www.uossm-canada.org
November 3, 2025 at 7:26 PM
"...more than 30 million people now need urgent humanitarian assistance" You can donate here: www.uossm-canada.org/sudan
"That arsenal [RSF's], and therefore the calamity in El Fasher and the wider Darfur region, is sponsored by the United Arab Emirates."
www.theguardian.com/commentisfre...
"That arsenal [RSF's], and therefore the calamity in El Fasher and the wider Darfur region, is sponsored by the United Arab Emirates."
www.theguardian.com/commentisfre...
www.science.org/doi/10.1126/...
Would be interested in a follow-up on infections dependent on T-cell immunity (eg, AIDS-defining illnesses)
Would be interested in a follow-up on infections dependent on T-cell immunity (eg, AIDS-defining illnesses)
Collateral effects of COVID-19 pandemic control on the US infectious disease landscape
Using data from the United States Centers for Disease Control and Prevention (CDC) disease surveillance systems, we sought to quantify the indirect effects of the COVID-19 pandemic, and the possibilit...
www.science.org
November 3, 2025 at 4:52 PM
www.science.org/doi/10.1126/...
Would be interested in a follow-up on infections dependent on T-cell immunity (eg, AIDS-defining illnesses)
Would be interested in a follow-up on infections dependent on T-cell immunity (eg, AIDS-defining illnesses)
Reposted by Catherine Clase
THE PEOPLE CRAVE TRAINS
Twenty minutes into this trip and I’m already thinking about breaking into my snacks. Mostly I’m just delighted to be back on a train again.
October 31, 2025 at 2:59 PM
THE PEOPLE CRAVE TRAINS
Patient on Automated PD presents with hypotension, abdominal pain , fever for 2 days. Symptoms developed after colonoscopy with polypectomy.
October 31, 2025 at 3:11 PM
‘The University of Florida muzzled infectious disease experts, said emeritus professor Doug Barrett, formerly the university’s chief of pediatrics and senior VP for health affairs.
“They’re told not to speak to anyone without permission from supervisors,” ‘
www.orlandosentinel.com/2025/10/30/d...
“They’re told not to speak to anyone without permission from supervisors,” ‘
www.orlandosentinel.com/2025/10/30/d...
Doctors muffled as Florida moves to end decades of childhood vaccination mandates
Florida plans to end nearly a half-century of required childhood immunizations against diseases that have killed and maimed millions of children. Many critics of the decision, including doctors, ar…
www.orlandosentinel.com
October 31, 2025 at 5:43 AM
‘The University of Florida muzzled infectious disease experts, said emeritus professor Doug Barrett, formerly the university’s chief of pediatrics and senior VP for health affairs.
“They’re told not to speak to anyone without permission from supervisors,” ‘
www.orlandosentinel.com/2025/10/30/d...
“They’re told not to speak to anyone without permission from supervisors,” ‘
www.orlandosentinel.com/2025/10/30/d...