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David Fisman.

@dfisman.bsky.social
31K followers 3.5K following 11K posts

Notorious pro-vaxxer and pro-masker. Famously unfair to pathogenic viruses, bacteria, fungi, and the Toronto Star. Weary of all these death threats with so little follow-through. www.dlsph.utoronto.ca/faculty-profi…

PostsRepliesMedia
David Fisman. @dfisman.bsky.social · 25/08/2026
“Increased risk of pulmonary embolism following SARS-CoV-2 activity in Ontario, Canada”, out today in Public Health with Clara Eunyoung Lee and Natalie J Wilson. COVID-19 raises pulmonary embolism risk — here’s the Ontario data: sciencedirect.com/science/arti...
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David Fisman. @dfisman.bsky.social · 19/06/2026
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David Fisman. @dfisman.bsky.social · 14/06/2026
Hope Pierre Poilievre can incorporate this into a future press conference about how Canadian cities have become hell holes
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David Fisman. @dfisman.bsky.social · 14/06/2026
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David Fisman. @dfisman.bsky.social · 11/06/2026
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David Fisman. @dfisman.bsky.social · 11/06/2026
Old hippie tells ai he misses the good old days when the humans were the ones hallucinating
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David Fisman. @dfisman.bsky.social · 11/06/2026
Greatest glass half full headline I’ve seen in a while
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David Fisman. @dfisman.bsky.social · 11/06/2026
Deceased academic in hell.  Demon says “reviewer 3 has several additional comments”
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David Fisman. @dfisman.bsky.social · 11/06/2026
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David Fisman. @dfisman.bsky.social · 11/06/2026
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David Fisman. @dfisman.bsky.social · 11/06/2026
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David Fisman. @dfisman.bsky.social · 11/06/2026
 A manger scene with the holy family and infant Jesus, and animals and shepherds.  The three kinds are there…two carrying jewelled chests and one with a large Frankenstein monster on a leash.  Caption: “We bring gold, myrrh, and Frankenstein.”
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David Fisman. @dfisman.bsky.social · 09/06/2026
I wrote this about the proposed Toronto island airport expansion when the idea first appeared, seemingly out of left field. davidfisman.substack.com/p/doug-ford-... @mark-carney.bsky.social @juliedabrusin.bsky.social #NobodyVotedForThis
davidfisman.substack.com
Doug Ford wants to put jets over Toronto's harbour.
Here's why that should alarm you.
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David Fisman. @dfisman.bsky.social · 09/06/2026
Let the feds know what you think of the ill-conceived proposal to bring jets and runway expansion to toronto‘s island airport Nobody voted for this, @mark-carney.bsky.social @juliedabrusin.bsky.social tc.canada.ca/en/corporate...
tc.canada.ca
Public consultation on the future of Billy Bishop Toronto City Airport
Consultation collecting feedback on the future of Billy Bishop Toronto City Airport
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David Fisman. @dfisman.bsky.social · 01/06/2026
I regret that I too have decided not to perform at the Freedom 250 concert, so if you want to hear Raisin Hell, my famous calypso about raisins, you’ll have to become my friend and come over.
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David Fisman. @dfisman.bsky.social · 31/05/2026
Hard to walk down the street in Toronto these days without being struck by the breadth and depth of our crisis in lack of care for those with major mental illness
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David Fisman. @dfisman.bsky.social · 31/05/2026
Is there a name for the pitching job that’s opposite of “closer”?
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David Fisman. @dfisman.bsky.social · 22/05/2026
New paper out in BMC Infectious Diseases, led by Natalie Wilson with Alicia Grima and Clara Lee: how we define hospital-acquired COVID changes whether we see its true mortality burden, and most common definitions hide it. 🧵
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David Fisman. @dfisman.bsky.social · 20/05/2026
It’s very hard to know what’s happening with Ebola given limited info. The sudden surge is most likely belated adjustment of case counts, and possibly healthcare environment superspreading events given hcw fatalities. It is unlikely that Ebola suddenly has an R of 6
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David Fisman. @dfisman.bsky.social · 15/05/2026
Worth your time. A brilliant conversation between @donmilton.bsky.social and @erictopol.bsky.social about how aerosol transmission works, and why it’s relevant to the hanta outbreak open.substack.com/pub/profairb...
open.substack.com
Live with Eric Topol & Donald Milton
A recording from Don Milton and Eric Topol's live video
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David Fisman. @dfisman.bsky.social · 15/05/2026
I’m sure it’s not what it sounds like
Japanese Burger King features  baby body burger
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David Fisman. @dfisman.bsky.social · 11/05/2026
Important read re: hanta and respiratory protection trishgreenhalgh.substack.com/p/fb368a53-f...
trishgreenhalgh.substack.com
Trish Greenhalgh
Professor of Primary Care Health Sciences, University of Oxford. Click to read Trish Greenhalgh on Substack. Launched 15 minutes ago.
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David Fisman. @dfisman.bsky.social · 08/05/2026
Joss Reimer is doing a really nice job with this presser, imo
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David Fisman. @dfisman.bsky.social · 08/05/2026
He did
Little cat says “I told you rodents were bad news”
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David Fisman. @dfisman.bsky.social · 08/05/2026
The key to person to person hanta is that it has a highly overdispersed R. That means that while individual cases can generate large numbers of secondary cases, most cases are dead ends.
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David Fisman. @dfisman.bsky.social · 05/05/2026
Dont bury the lede @theonion.com “At press time, the epidemiologists were reportedly investigating evidence of interspecies Mar-a-Lago face transmission after a fur farm in Pennsylvania was forced to cull thousands of mink that looked like former Rep. Matt Gaetz“ theonion.com/epidemiologi...
theonion.com
Epidemiologists Confirm First Airborne Transmission Of Mar-A-Lago Face
WASHINGTON—In a troubling discovery that has public health researchers on high alert for a wider outbreak, a team of Georgetown University epidemiologists announced Tuesday that they had confirmed the...
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David Fisman. @dfisman.bsky.social · 05/05/2026
Haters gonna hate but my cat loved the met gala
A cat dressed all fancy
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David Fisman. @dfisman.bsky.social · 05/05/2026
The @who.int summary of the hanta cluster is available. The shape of the epi curve is helpful…as is the history of onshore Argentina travel by the index case. www.who.int/emergencies/...
who.int
Hantavirus cluster linked to cruise ship travel, Multi-country
On 2 May 2026, a cluster of passengers with severe respiratory illness aboard a cruise ship was reported to the World Health Organization. The ship is carrying 147 passengers and crew. As of 4 May 202...
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David Fisman. @dfisman.bsky.social · 04/05/2026
It makes a lot of sense that if Ontario place is going to be a casino catering to high rollers, you’d want a convenient spot next door for folks to land their private jets. No? Because otherwise the airport expansion thing makes zero sense.
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David Fisman. @dfisman.bsky.social · 04/05/2026
CBC Toronto describing hantaviruses as “highly contagious”. No. They are NOT person to person transmitted.
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David Fisman. @dfisman.bsky.social · 04/05/2026
We were going to dine out but can’t find my ID 😔
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David Fisman. @dfisman.bsky.social · 03/05/2026
What the heck www.cbc.ca/news/world/s...
cbc.ca
Suspected hantavirus outbreak on cruise ship kills 3, WHO says | CBC News
In a statement to The Associated Press, the WHO said an investigation was ongoing but that at least one case of hantavirus had been confirmed.
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David Fisman. @dfisman.bsky.social · 02/05/2026
… www.washingtonpost.com/world/2026/0...
washingtonpost.com
To tilt Hungarian election, Russians proposed staging assassination attempt
To aid Hungarian Prime Minister Viktor Orban, a friend of Russia, in his election, operatives proposed “the Gamechanger” — a staged assassination attempt to stir supporters.
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David Fisman. @dfisman.bsky.social · 01/05/2026
More on the wretchedly flawed masks v respirators trial Per the authors, pointing out numerous misstatements and flaws could “undermine trial efforts” Not the flex you think that is, chaps www.bmj.com/content/393/...
bmj.com
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David Fisman. @dfisman.bsky.social · 25/04/2026
This is amazing Open online course on LLM from @carlbergstrom.com and Jevin West H/t @gregggonsalves.bsky.social thebullshitmachines.com
thebullshitmachines.com
Modern-Day Oracles or Bullshit Machines: Introduction
A free online humanities course about how to learn and work and thrive in an AI world.
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David Fisman. @dfisman.bsky.social · 23/04/2026
New in plos with colleagues from Pfizer vaccines and IQVIA journals.plos.org/plosone/arti...
journals.plos.org
Healthcare resource utilization and cost burden of COVID-19 according to vaccination status in adults in Ontario, Canada, 2021–2023
Aims This study aims to describe healthcare resource utilization (HCRU) and cost burden associated with COVID-19 cases in Ontario, Canada, and assess variations by vaccination status. Methods We con...
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David Fisman. @dfisman.bsky.social · 21/04/2026
I can’t share the recording of my @escmid.bsky.social talk here directly, but I’ve used Google Notebooks LM to make a podcast version of it Hope you enjoy it. notebooklm.google.com/notebook/4ce...
notebooklm.google.com
Sign in - Google Accounts
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David Fisman. @dfisman.bsky.social · 20/04/2026
I’m big in Germany
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David Fisman. @dfisman.bsky.social · 17/04/2026
A really important critique of the flawed @AnnalsofIM masks vs respirators trial. Good on @bmj_latest for publishing it www.bmj.com/content/393/...
bmj.com
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David Fisman. @dfisman.bsky.social · 17/04/2026
What a treat to be at @escmid.bsky.social Global in Munich. Excited to network with and learn from global colleagues
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David Fisman. @dfisman.bsky.social · 14/04/2026
how’s that Nobel peace prize coming
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David Fisman. @dfisman.bsky.social · 14/04/2026
The weather in Toronto rn makes me think God saw Trump’s social media posts
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David Fisman. @dfisman.bsky.social · 13/04/2026
you see, this is why tiles are so great www.marineinsight.com/u-s-navys-20...
marineinsight.com
U.S Navy’s $200 Million MQ-4C Triton Drone Goes Missing Over Strait Of Hormuz
Marine Insight - The maritime industry guide.
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David Fisman. @dfisman.bsky.social · 12/04/2026
Farewell, worst ever Hungarian meatball
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David Fisman. @dfisman.bsky.social · 12/04/2026
I swear if you don’t open this strait this minute I’m going to, uh, close it
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David Fisman. @dfisman.bsky.social · 06/04/2026
Some thoughts on Toronto’s proposed airport expansion, written from my perspectives as a harbor user and epidemiologist open.substack.com/pub/davidfis... @serenapurdy.bsky.social @mark-carney.bsky.social @juliedabrusin.bsky.social @liberalca.bsky.social @theglobeandmail.com
open.substack.com
Doug Ford wants to put jets over Toronto's harbour.
Here's why that should alarm you.
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David Fisman. @dfisman.bsky.social · 02/04/2026
Work in progress: sars-2 clearly increases risk of tuberculosis activation in central Ontario, on a timeline that is consistent with T cell injury. It does not impact risk of non tuberculous mycobacterial infections More follows
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David Fisman. @dfisman.bsky.social · 25/03/2026
www.medrxiv.org/content/10.6...
medrxiv.org
Higher SARS-CoV-2 Transmission Burden Among Racialized Individuals: Evidence from Canadian Serology Data
Introduction: COVID-19 transmission has not been evenly distributed across racial groups, with exposure being shaped by social and structural factors. The emergence of highly transmissible variants (i...
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David Fisman. @dfisman.bsky.social · 22/03/2026
Socioeconomic disparities in COVID risk in Canada: persistence despite widespread infection risk www.medrxiv.org/content/10.6...
medrxiv.org
Seroprevalence Convergence Does Not Reflect Transmission Equity: Persistent Socioeconomic Disparities in COVID-19 Force of Infection in Canada
Background Socioeconomic disparities in COVID-19 outcomes have been widely documented, but evidence regarding inequities in SARS-CoV-2 transmission remains mixed. In Canada, infection-induced seroprev...
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