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Mark Dexter

@pedsdocdex.bsky.social
43 followers 28 following 202 posts

Pediatric intensivist, lover of vaccines, pie-diatrician, currently in Boston.

PostsRepliesMedia
Mark Dexter @pedsdocdex.bsky.social · 08/10/2026
No, @npr.org, RFK Jr. has not been “raising questions” about vaccines for years. He’s a blatant anti-vax propagandist.
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Mark Dexter @pedsdocdex.bsky.social · 30/09/2026
(Even though the default is, and should be, gin.)
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Mark Dexter @pedsdocdex.bsky.social · 30/09/2026
Instantly getting paged by pharmacy because I didn’t specify a route or the base spirit.
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Memento (spooky) Morty 🌙 @mementomorty.bsky.social · 30/09/2026
i had a family member request we give their dying loved one ivermectin to treat their cancer because chatgpt said it was a cure for both and it is not
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Mark Dexter @pedsdocdex.bsky.social · 30/09/2026
Raw milk sold by a chiropractor???? We’re just layering on the quackery!
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Mark Dexter @pedsdocdex.bsky.social · 18/09/2026
Why can’t I find an order for martinis in Epic?
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Mark Dexter @pedsdocdex.bsky.social · 18/09/2026
These people are not “skeptics” by any definition of the word and NYT headline editors should stop labeling them as such.
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Mark Dexter @pedsdocdex.bsky.social · 06/09/2026
State nursing & medical boards haven’t revoked enough licenses over the last decade.
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Mark Dexter @pedsdocdex.bsky.social · 04/09/2026
Cowards.
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Mark Dexter @pedsdocdex.bsky.social · 10/08/2026
Stephen Miller still out here speedrunning the “worst Duke grad ever” race.
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Mark Dexter @pedsdocdex.bsky.social · 10/08/2026
The only epidemic is measles, which is spreading because people are foregoing vaccination. 🤦‍♂️
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Mark Dexter @pedsdocdex.bsky.social · 09/08/2026
Bhattacharya’s attacks are one of the main reasons people have lost faith in public health.
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Mark Dexter @pedsdocdex.bsky.social · 04/08/2026
Weird choice since in pediatrics it’s button batteries we worry about.
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Mark Dexter @pedsdocdex.bsky.social · 04/08/2026
Two doses of the MMR vaccine costs the government about fifty bucks. 🤦‍♂️ www.reuters.com/legal/litiga...
reuters.com
A single US measles outbreak can cost millions of dollars, study estimates
The overall cost of containing a 2025 measles outbreak in New Mexico was nearly $5.4 ‌million, a new study estimates.
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Memento (spooky) Morty 🌙 @mementomorty.bsky.social · 03/08/2026
these lunatics might be able to lie to a lot of people, but what they're forgetting is how many frontline workers lived the exact same experience across the entire world
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Mark Dexter @pedsdocdex.bsky.social · 03/08/2026
This man is a liar. Signed, A pediatric ICU doctor who was taking care of intubated adult COVID patients in a Boston PICU in 2020 because the adult ICUs were full.
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Mark Dexter @pedsdocdex.bsky.social · 29/07/2026
I see way too many professional org talks & grand rounds about “how do we regain trust in public health” and not nearly enough about who is actually destroying said trust.
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Mark Dexter @pedsdocdex.bsky.social · 29/07/2026
He’s a goddamn doctor!!!
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paulpro @mariopro.bsky.social · 29/07/2026
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Mark Dexter @pedsdocdex.bsky.social · 29/07/2026
If you’re saying that hundreds of thousands of people were “injured” by the COVID vaccine, either you don’t understand biostatistics at even a rudimentary level or you’re lying. Either one of those should disqualify you from holding a medical license.
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Mark Dexter @pedsdocdex.bsky.social · 29/07/2026
Senators Johnson and Moreno are clowns from whom I don’t expect anything, but Rand Paul and Roger Marshall are fellow physicians and should be ashamed of how they’re attacking Fauci.
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Mark Dexter @pedsdocdex.bsky.social · 23/07/2026
Bill Cassidy should voluntarily surrender his medical license in shame.
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Ryan Marino, MD @ryanmarino.bsky.social · 23/07/2026
Idk maybe your opinion about children’s health should be worthless if you’d rather see a child die than accept neurodivergence
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Mark Dexter @pedsdocdex.bsky.social · 21/07/2026
We’re gonna have to make Ralph Northam the next ambassador to Italy. He’ll personally have the problem solved in two months. www.chesapeakebaymagazine.com/italy-puts-1...
chesapeakebaymagazine.com
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Mark Dexter @pedsdocdex.bsky.social · 16/07/2026
Pizza party courtesy of the c-suite!
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Meredith Shiner @meredithshiner.com · 16/07/2026
"Why isn't anyone else wearing a mask when the air is so bad?" was high heat from the kid born in SEPTEMBER TWENTY TWENTY
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Mark Dexter @pedsdocdex.bsky.social · 16/07/2026
Yes, allergies are important but if you’re microwaving fish in the break room we have way bigger issues to deal with.
A sticker above the countdown on a microwave where someone has written “Please Clean After Fish PATIENTS with allergies.” The timer shows 2 seconds left.
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Mark Dexter @pedsdocdex.bsky.social · 02/07/2026
My PICU fellowship was at the hospital that had NC’s burn center. I would have little twinges of panic every summer when I’d drive past the pop-up fireworks stand near my apartment.
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Mark Dexter @pedsdocdex.bsky.social · 13/06/2026
My new intro when teaching PALS:
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Mark Dexter @pedsdocdex.bsky.social · 12/06/2026
Your med school anatomy course didn’t cover the bluterus?
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Mark Dexter @pedsdocdex.bsky.social · 11/06/2026
I’ll show you a screenshot of the BCH paging system at some point…and those are just the pediatric subspecialties. 🤦‍♂️
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Mark Dexter @pedsdocdex.bsky.social · 11/06/2026
When you think about it, “thank you for your attention to this matter!” is just his version of the “thank you for this interesting consult” chart junk.
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Nicholas Grossman @nicholasgrossman.bsky.social · 17/05/2026
The Physicians for Measles Caucus in the US Senate is losing its most prominent member, as Republican Bill Cassidy, MD and RFK Jr. confirmer, has lost the primary. Many Republican Senators have violated their oath of office. Bill Cassidy was one of the few to violate the Hippocratic oath as well.
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Mark Dexter @pedsdocdex.bsky.social · 17/05/2026
Except now we’re all suffering with RFK, Jr. running DHS when Cassidy voting against him would have led to the same outcome.
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Mark Dexter @pedsdocdex.bsky.social · 17/05/2026
Bill Cassidy is a coward who got exactly what he deserved.
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Alejandra Caraballo @esqueer.net · 16/05/2026
Texas Children's caved and ended care under pressure in April 2022, over four years ago and they still got targeted by DOJ and Paxton. NYU caved and they still got served with a grand jury subpoena. Caving and abandoning will not save you. You have to fight these bastards or they will destroy you.
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Duaa Eldeib @deldeib.bsky.social · 06/05/2026
This was a hard story to report. Newborns who don’t get a vitamin K shot are 81 times more likely to develop a condition where they bleed uncontrollably. But more and more families are declining the shot. And babies are dying. www.propublica.org/article/more...
propublica.org
Babies Are Bleeding to Death as Parents Reject a Vitamin Shot Given at Birth
A lifesaving injection given at birth to prevent severe bleeding has become collateral damage of the anti-vaccine movement.
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Mark Dexter @pedsdocdex.bsky.social · 06/05/2026
Just absolute “WTF???” news. Especially from an admin that claims to want to “protect” children.
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Kristen Panthagani, MD, PhD @kmpanthagani.bsky.social · 01/05/2026
Did AI really beat ER doctors at ER triage? Nope. But with the headlines circulating this week around a new Science paper, you wouldn’t be blamed for walking away with that conclusion. Here’s what actually happened and why the headlines are wrong: www.youcanknowthings.com/did-ai-reall...
youcanknowthings.com
Did AI really beat ER doctors at ER triage?
Nope. A look at an interesting AI study that has led to some very overhyped headlines. Yesterday a new study was published in Science comparing the diagnostic capacity of several AI tools to physicia...
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Mark Dexter @pedsdocdex.bsky.social · 02/05/2026
I don’t know which is worse - if she knows that but is posting in bad faith to make it sound scary, or if she doesn’t know that.
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Thomas [DARK MODE], DO @tom.medsky.social · 02/05/2026
Mary this is literally how vaccines are supposed to work.
A tweet from yesterday from Mary Talley Bowden. 

I’m seeing a pattern in my clinic that we can't ignore. Antibody levels in patients who received the shots are testing 10 times higher than those who didn't. Here is why that spike protein load matters.
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Mark Dexter @pedsdocdex.bsky.social · 01/05/2026
These goddamn idiots.
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Mark Dexter @pedsdocdex.bsky.social · 24/04/2026
As a physician who lives in Boston, I support this tactic.
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Mark Dexter @pedsdocdex.bsky.social · 21/04/2026
Uhhhhhhhhhhhhhhhhh. 😳
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Me and a small nugget of love. 🇸🇪♥️🇺🇦 @mnotme.bsky.social · 19/04/2026
The human circulatory system, before and after proper cable management.
two images of the human body's circulatory system. One of them with good cable management
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Mark Dexter @pedsdocdex.bsky.social · 20/04/2026
I don’t think you’re licensed to do that internally, though. 😳
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Malaclypse the Middle @malaclypse.bsky.social · 15/04/2026
MA’s 2.1% should be a disgrace, rather than the best score in the nation. I guess it can be both.
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Mark Dexter @pedsdocdex.bsky.social · 12/04/2026
I call bs. The IV beeps will haunt you for the rest of this life and all of your next ones.
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Thomas Neville @goobermunch.bsky.social · 06/04/2026
Just going to leave this here.
A series of three tweets:

Rabbi Akiva Weisinger
@MisfitTorah

1)

For those wondering why I, an Orthodox Rabbi, am outraged by the Texas trans law, aren't I supposed to stand up for Torah Values or whatever A thread:

2)

I don't like it when kids kill themselves.

3)

 End of thread.
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