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... 315787
David Fisman. @dfisman.bsky.social · 14/06/2026Hope Pierre Poilievre can incorporate this into a future press conference about how Canadian cities have become hell holes 0111
David Fisman. @dfisman.bsky.social · 11/06/2026Greatest glass half full headline I’ve seen in a while 0112
David Fisman. @dfisman.bsky.social · 09/06/2026I 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 #NobodyVotedForThisdavidfisman.substack.comDoug Ford wants to put jets over Toronto's harbour.Here's why that should alarm you. 33715
David Fisman. @dfisman.bsky.social · 09/06/2026Let 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.caPublic consultation on the future of Billy Bishop Toronto City AirportConsultation collecting feedback on the future of Billy Bishop Toronto City Airport 69669
David Fisman. @dfisman.bsky.social · 01/06/2026I 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. 10672
David Fisman. @dfisman.bsky.social · 31/05/2026Hard 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 2627550
David Fisman. @dfisman.bsky.social · 31/05/2026Is there a name for the pitching job that’s opposite of “closer”? 3342
David Fisman. @dfisman.bsky.social · 22/05/2026New 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. 🧵 09644
David Fisman. @dfisman.bsky.social · 20/05/2026It’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 06910
David Fisman. @dfisman.bsky.social · 15/05/2026Worth 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.comLive with Eric Topol & Donald MiltonA recording from Don Milton and Eric Topol's live video 25019
David Fisman. @dfisman.bsky.social · 11/05/2026Important read re: hanta and respiratory protection trishgreenhalgh.substack.com/p/fb368a53-f...trishgreenhalgh.substack.comTrish GreenhalghProfessor of Primary Care Health Sciences, University of Oxford. Click to read Trish Greenhalgh on Substack. Launched 15 minutes ago. 512067
David Fisman. @dfisman.bsky.social · 08/05/2026Joss Reimer is doing a really nice job with this presser, imo 161
David Fisman. @dfisman.bsky.social · 08/05/2026The 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. 28532
David Fisman. @dfisman.bsky.social · 05/05/2026Dont 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.comEpidemiologists Confirm First Airborne Transmission Of Mar-A-Lago FaceWASHINGTON—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... 0436
David Fisman. @dfisman.bsky.social · 05/05/2026The @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.intHantavirus cluster linked to cruise ship travel, Multi-countryOn 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... 23919
David Fisman. @dfisman.bsky.social · 04/05/2026It 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. 610026
David Fisman. @dfisman.bsky.social · 04/05/2026CBC Toronto describing hantaviruses as “highly contagious”. No. They are NOT person to person transmitted. 1410321
David Fisman. @dfisman.bsky.social · 03/05/2026What the heck www.cbc.ca/news/world/s...cbc.caSuspected hantavirus outbreak on cruise ship kills 3, WHO says | CBC NewsIn a statement to The Associated Press, the WHO said an investigation was ongoing but that at least one case of hantavirus had been confirmed. 89641
David Fisman. @dfisman.bsky.social · 02/05/2026… www.washingtonpost.com/world/2026/0...washingtonpost.comTo tilt Hungarian election, Russians proposed staging assassination attemptTo aid Hungarian Prime Minister Viktor Orban, a friend of Russia, in his election, operatives proposed “the Gamechanger” — a staged assassination attempt to stir supporters. 3317
David Fisman. @dfisman.bsky.social · 01/05/2026More 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 03311
David Fisman. @dfisman.bsky.social · 25/04/2026This is amazing Open online course on LLM from @carlbergstrom.com and Jevin West H/t @gregggonsalves.bsky.social thebullshitmachines.comthebullshitmachines.comModern-Day Oracles or Bullshit Machines: IntroductionA free online humanities course about how to learn and work and thrive in an AI world. 12812
David Fisman. @dfisman.bsky.social · 23/04/2026New in plos with colleagues from Pfizer vaccines and IQVIA journals.plos.org/plosone/arti...journals.plos.orgHealthcare resource utilization and cost burden of COVID-19 according to vaccination status in adults in Ontario, Canada, 2021–2023Aims 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... 15727
David Fisman. @dfisman.bsky.social · 21/04/2026I 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.comSign in - Google Accounts 1248
David Fisman. @dfisman.bsky.social · 17/04/2026A 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 15024
David Fisman. @dfisman.bsky.social · 17/04/2026What a treat to be at @escmid.bsky.social Global in Munich. Excited to network with and learn from global colleagues 0441
David Fisman. @dfisman.bsky.social · 14/04/2026The weather in Toronto rn makes me think God saw Trump’s social media posts 3353
David Fisman. @dfisman.bsky.social · 13/04/2026you see, this is why tiles are so great www.marineinsight.com/u-s-navys-20...marineinsight.comU.S Navy’s $200 Million MQ-4C Triton Drone Goes Missing Over Strait Of HormuzMarine Insight - The maritime industry guide. 2183
David Fisman. @dfisman.bsky.social · 12/04/2026I swear if you don’t open this strait this minute I’m going to, uh, close it 69510
David Fisman. @dfisman.bsky.social · 06/04/2026Some 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.comopen.substack.comDoug Ford wants to put jets over Toronto's harbour.Here's why that should alarm you. 65824
David Fisman. @dfisman.bsky.social · 02/04/2026Work 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 211748
David Fisman. @dfisman.bsky.social · 25/03/2026www.medrxiv.org/content/10.6...medrxiv.orgHigher SARS-CoV-2 Transmission Burden Among Racialized Individuals: Evidence from Canadian Serology DataIntroduction: 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... 12916
David Fisman. @dfisman.bsky.social · 22/03/2026Socioeconomic disparities in COVID risk in Canada: persistence despite widespread infection risk www.medrxiv.org/content/10.6...medrxiv.orgSeroprevalence Convergence Does Not Reflect Transmission Equity: Persistent Socioeconomic Disparities in COVID-19 Force of Infection in CanadaBackground 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... 14924