🍁 Bryan Heit, PhD 🍁
banner
bryanheit.bsky.social
🍁 Bryan Heit, PhD 🍁
@bryanheit.bsky.social
Canadian immunologist who looks at host-pathogen interactions, cardiovascular disease & how they intersect. Also a big 🔬, 🔭 & 3D printing nerd. I ❤️ 🧀,🐝, 🍺 & 🐐.

Same username on threads. He/him.

www.phagocytes.ca
www.micrographiauwo.ca
It's a great series!
November 24, 2025 at 7:37 PM
I think these are similar: www.emsdiasum.com/secure-seal-...

Also, we've used 3D printing to make microchambers for mammalian cell microscopy and recently have experimented with printing directly onto glass - that may be an alternative as well.
Sealing Chambers
GeneCone chambers, HybriWell sealing chambers, ONCYTE Film-WellT for cell based microarrays, HybriSlip hybridization cover, MultiSlip cell culture coverslip inserts, Secureslip cell Culture coverslips...
www.emsdiasum.com
November 20, 2025 at 12:49 PM
That's pretty cool!
November 20, 2025 at 12:43 PM
It's unethical (& in most jurisdictions, illegal) to include people in trials who are at a high known risk for adverse events. That said, the trial size is more than large enough to capture MCAS at rates noted in COVID patient cohorts.
November 20, 2025 at 2:35 AM
The work you "wish" would be done is, and has been, done. For decades (in general) and since the early 2000s for mRNA vaccines specifically. The issue isn't that this work isn't being done - it's that you're not aware of this work and therefore assumed incorrectly that no one is doing it. /end
November 20, 2025 at 2:28 AM
You stated that a rare side effect has only been known about for 15 years and therefore not enough research has been done. In reality, it's been investigated for nearly 50 years to the tune of over 800 studies. /1
November 20, 2025 at 2:25 AM
It's almost as though we know about these things and monitor for them specifically in trials...how strange.
a cartoon of batman with his hand on his chin
Alt: a cartoon of batman with his hand on his chin
media.tenor.com
November 20, 2025 at 2:18 AM
And there are people who explicitly and specifically study these topics. But trying to pretend that this work hasn't been ongoing for over 30 years is both a lie and a disservice to the massive amount of work already done on the field. Shifting the goalposts doesn't change that.
November 20, 2025 at 2:16 AM
As medical science advances we can often more finely divide patients into distinct diagnostic categories, but the invention of a new category does not mean that the (often decades of) work leading up to that new categorization is irrelevant or outdated.
November 20, 2025 at 2:04 AM
That is incorrect. Mast Cell Activation Syndrome was first proposed as a separate condition from idiopathic anaphylaxis by Stoloff et al in 1992, with the first treatment proposals put forward in 1995 by Murray et al. Research into idiopathic anaphylaxis go back to the 1970s. /1
November 20, 2025 at 2:03 AM
They do study the side effects. mRNA vaccines have been in development since the 1980's, with the first human trials occuring over 25 years ago. Much of that research was into side effects and other potential risks. There are literally hundreds of scientific studies on this topic.
November 20, 2025 at 1:50 AM
I apparently got my PhD so that, after I do something particularly stupid, my wife can give me a long stare and say "good job, doctor Heit".
October 27, 2025 at 3:12 PM
We can still bring in international students, but not as many as in the past (nor as many as most universities planned for). The cap includes MSc and PhD students, so visa availability is down across the board.
October 12, 2025 at 10:59 AM
I'm not sure website views are a meaningful metric. Regardless, at an undergrad/grad level, Canada has reduced student visas which has reduced international student enrollment.
October 12, 2025 at 2:15 AM
Not exactly. Operating funds to provide undergraduate educational programs is mostly provincial. Money that supports scientific research is almost entierly federal - by a factor of 10:1, if not more
October 12, 2025 at 2:13 AM
While I've never seen the supreme court in action, I did have the unfortunate experience of serving on a provincial court jury last year. That experience didn't exactly give me faith in the robustness of our justice system, nor in the capabilities of our judges.
October 6, 2025 at 9:37 PM
I'm torn, as being hurried with cheese still tops my list. It's a gouda way to go.

www.cnn.com/2024/09/25/s...
DNA from 3,600-year-old cheese sequenced by scientists | CNN
Scientists have sequenced DNA from 3,600-year-old cheese, the oldest in the archaeological record. The intact cheese was found with mummified remains in China.
www.cnn.com
October 3, 2025 at 11:47 AM