David Fisman.'s Avatar

David Fisman.

@dfisman.bsky.social

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. https://www.dlsph.utoronto.ca/faculty-profile/fisman-david-n

31,192 Followers  |  3,422 Following  |  11,689 Posts  |  Joined: 14.05.2023  |  2.3827

Latest posts by dfisman.bsky.social on Bluesky

Thank you!

04.08.2025 00:46 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thanks!! A lot of hard work paid off. It’s really gratifying.

04.08.2025 00:45 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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😊

04.08.2025 00:43 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thanks!!

03.08.2025 21:38 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thank you!

03.08.2025 21:38 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thanks!!

03.08.2025 21:38 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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This past winter i set a goal for myself, and today I achieved it 😊

🚣

03.08.2025 21:33 β€” πŸ‘ 207    πŸ” 2    πŸ’¬ 34    πŸ“Œ 0
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Turkey’s Erdogan Fires Statistics Chief After Record Inflation The president of the Turkish statistical institute, Sait Dincer, was removed from office and replaced by Erhan Cetinkaya, who had been deputy president of Turkey’s Banking Regulation and Supervision A...

um. www.wsj.com/world/middle...

01.08.2025 22:39 β€” πŸ‘ 4658    πŸ” 1572    πŸ’¬ 197    πŸ“Œ 236

Sometimes I think of how only two generations of us were even allowed to attend these settler colonial ass universities in tiny, awkward handfuls, and how even that was too much

02.08.2025 01:34 β€” πŸ‘ 6115    πŸ” 1138    πŸ’¬ 57    πŸ“Œ 36

You don’t fool me, Mandy Patinkin

02.08.2025 02:34 β€” πŸ‘ 10    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0
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My name is Inigo Montoya
You doinked my father with a baseball
Prepare to die

02.08.2025 02:25 β€” πŸ‘ 18    πŸ” 0    πŸ’¬ 4    πŸ“Œ 0
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a cartoon character wearing a hat and goggles is pointing at something and saying `` double drats '' . ALT: a cartoon character wearing a hat and goggles is pointing at something and saying `` double drats '' .

Saw a man with a waxed moustache on the subway and wondering if he’s ever tempted to do evil things just so he can twirl it

01.08.2025 22:05 β€” πŸ‘ 32    πŸ” 1    πŸ’¬ 2    πŸ“Œ 0
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Unbelievable

But entirely believable

01.08.2025 20:06 β€” πŸ‘ 580    πŸ” 68    πŸ’¬ 61    πŸ“Œ 13

My god, Kermit the Frog dressed in his press trench coat is going to be found murdered outside the shuttered Hooper’s Store before this is over.

01.08.2025 18:14 β€” πŸ‘ 16    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0
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Paris cycling numbers double in one year thanks to massive investment and it's not stopping The report delves into the nuances of Parisian cycling culture, exploring the vibrant community of riders who navigate the city's streets

Paris urban biking DOUBLED in just one year.

β€œCycling in Paris has transcended mere trendiness; it’s become a fundamental aspect of the city’s identity. Despite challenges like inclement weather, cyclists continue to flock to the streets, setting new records and reshaping the urban landscape.”

19.07.2025 07:12 β€” πŸ‘ 2225    πŸ” 740    πŸ’¬ 36    πŸ“Œ 140
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Insights from a Ventilation-Aware Pandemic and Outbreak Risk Model (VAPOR) Transmission of airborne pathogens in indoor spaces is strongly modulated by heterogeneity in ventilation. Understanding the role indoor air plays in pandemic risk is limited in part due to differing ...

Our preprint is here. The paper is under review at a journal. If there's interest I can try to unpack the paper in a non-technical way, and also talk about how such a model might be used moving forward.

www.medrxiv.org/content/10.1...

01.08.2025 16:33 β€” πŸ‘ 74    πŸ” 15    πŸ’¬ 11    πŸ“Œ 3

There's an obvious fix to this siloed approach: combine the models. We did that, creating the "VENTILATION-AWARE PANDEMIC and OUTBREAK RISK" model. Clunky, but we wanted to be able to call it the VAPOR model 😁

01.08.2025 16:33 β€” πŸ‘ 64    πŸ” 7    πŸ’¬ 1    πŸ“Œ 0

...types of clean air delivery too, like filtration (and masks, which are just filters on your face) and decontamination (e.g., UV).

The epidemiological model focusses on epidemic growth and the concept of reproduction over several generations of an outbreak.

01.08.2025 16:33 β€” πŸ‘ 25    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

Key difference: WR tries to predict how many people sharing air in an indoor space will acquire infection if an infectious case is introduced into the space. This model runs for a single generation. WR is nice because it explicitly considers ventilation...it can be adapted to consider other...

01.08.2025 16:33 β€” πŸ‘ 24    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

Epidemiologists studying similar phenomena (outbreaks in small populations, with stochasticity/randomness) might use some variant of the Reed-Frost model, which is similar in age but was formalized mathematically by Paul Fine in the 1970s.

01.08.2025 16:28 β€” πŸ‘ 30    πŸ” 1    πŸ’¬ 1    πŸ“Œ 1

One of the really interesting things I learned during the pandemic was just how siloed scientific disciplines are, even when the scientists involved are studying the same subject.

For indoor air and infection, aerosol scientists have a canonical model (Wells-Riley) that dates from the 1930s.

01.08.2025 16:27 β€” πŸ‘ 146    πŸ” 30    πŸ’¬ 6    πŸ“Œ 3

I mean it’s not a matter to me of fine or not fine. I think I may be exhibiting my own cognitive bias in that I really don’t want to think about the implications of a President and several Attorneys General covering up a child sex trafficking ring.

01.08.2025 15:57 β€” πŸ‘ 20    πŸ” 2    πŸ’¬ 2    πŸ“Œ 0

Yeah...it's getting up there. We have some covid stuff that seems to be rising so I think it might go up.

01.08.2025 16:23 β€” πŸ‘ 5    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I wish I existed IRL :(

01.08.2025 16:21 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Please see my statement regarding the flawed report released earlier this week concerning Canadian arms exports ⬇️

01.08.2025 14:06 β€” πŸ‘ 136    πŸ” 91    πŸ’¬ 36    πŸ“Œ 8

I have not worked at University Health Network since 2020 btw but you're not supposed to edit your own wikipedia page.

01.08.2025 16:18 β€” πŸ‘ 18    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

sadly I have died please donate to daily bread and Toronto humane society thanks

01.08.2025 16:17 β€” πŸ‘ 64    πŸ” 3    πŸ’¬ 3    πŸ“Œ 0
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I love that I'm an internet personality

01.08.2025 16:17 β€” πŸ‘ 71    πŸ” 4    πŸ’¬ 5    πŸ“Œ 0

It’s art, in its way

01.08.2025 14:13 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

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