@UTSWDerm trained Board-Certified Dermatologist | Husband | Father | 🇨🇦🇺🇸 | @BYU alum | @VisualDx Advisory Board | Tweets are mine and are not med advice.

Joined May 2011
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Everyone else in medicine: it’s a maculopapular rash Dermatologists:
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David Harker, MD, FAAD retweeted
Pediatrics is one of the lower paying physician specialties out there. Do people genuinely think pediatricians are rolling in money because they recommend vaccines? Like… You think pediatricians are getting secret PayPal notifications every time they vaccinate a child? Meanwhile… Do people apply this same skepticism to: Supplement sales? Affiliate links? Brand deals? Paid memberships? Coaching programs? Interesting how financial conflicts only seem to matter when it fits a bias…..
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David Harker, MD, FAAD retweeted
One very telling moment from that Trump interview on NBC that I keep thinking about —-
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David Harker, MD, FAAD retweeted
Next time MAHA releases some slop report, know that less than half of its citations are accurate. (In other words, the group lies relentlessly, even on official documents)
"Our systematic review found that in fact more than half of the citations were less than fully accurate. . . effective interventions should be informed by the science & evidence-based, rather than misrepresenting the research literature to claim support for questionable policies"
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RT @PeterHotez: America is eating its young. We’re a nation built on the greatness of our research universities, it’s what gave us the Manh…
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David Harker, MD, FAAD retweeted
Two false claims by @SecKennedy, both easy to check. "First in her class at Stanford Medical School": Stanford does not calculate class rank. "Walked away from her medical practice": she didn't complete her residency. studentservices.stanford.edu…
President Trump’s Surgeon General nominee, Casey Means, stands as one of the MAHA movement’s most powerful evangelists. Her book Good Energy, which exposed the nation’s catastrophic decline in metabolic health, has become a bible for the MAHA movement. After graduating first in her class at Stanford Medical School, Casey walked away from her medical practice because she no longer wanted to be part of a sick-care system. She has committed her life to transforming American health care. By sabotaging this appointment, Bill Cassidy once again did the dirty work for entrenched interests seeking to stall the MAHA movement and protect the very status quo that has made America the sickest nation on earth. Casey Means will remain an important leader and a close partner as we uncover the root causes of the chronic disease epidemic and Make America Healthy Again.
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David Harker, MD, FAAD retweeted
When I think of a leader of a world superpower who doomed his country to a stagnant future by replacing science with ideology & experts with political minions, I think of Stalin. The Soviet Union never recovered. That is what Trump & RFKJr are doing now. We can still stop it.
The Trump administration has downsized US science by historic margins — but it's not just via grant or workforce cuts. Our new @nature analysis reveals the government has cut more than 100 scientific advisory panels across all major science agencies.
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David Harker, MD, FAAD retweeted
This is a dangerous lie The HPV vaccine is in fact so effective at preventing cervical cancer that it is on course to eliminate..yes ELIMINATE..cervical cancer in countries from Sweden to Australia to Scotland
Did you know if you already had HPV its vaccine made you more likely to get cervical cancer? Before COVID, Gardasil was the worst vaccine unleashed upon America—so CDC covered up its issues to sell more shots. Here I reveal all the data they hid from us midwesterndoctor.com/p/the-h…
Community note
The HPV vaccine does not increase cervical cancer risk if already infected; it protects against other HPV strains not yet acquired. Large-scale studies show it reduces cervical cancer incidence by 63-90% overall, with near-total prevention when given before age 17. cancer.gov/news-events/ca… cdc.gov/hpv/vaccinatio… cochrane.org/about-us/news/…
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David Harker, MD, FAAD retweeted
The confidence of the uninformed is always impressive. Newborn hepatitis B vaccination is not about guessing risk — it is about preventing a lifelong infection acquired at birth that carries a high chance of chronic disease, cirrhosis, and liver cancer. A few facts the outrage conveniently ignores: Maternal testing is not perfect. Missed screening, lab error, and late pregnancy infection all happen. The birth dose closes that gap. Transmission at birth is uniquely dangerous. Up to 90% of infected newborns develop chronic hepatitis B. Adults? Less than 5%. Early vaccination works. Countries that implemented birth-dose vaccination have seen dramatic drops in childhood hepatitis B and liver cancer. Immunity does not “wear off” in the way claimed. Protection persists via immune memory, even if antibody levels decline. Boosters are not routinely needed. This is not pharma theater. It is one of the most successful cancer-prevention strategies ever deployed. Calling it unjustified is a failure to understand basic infectious disease. And as usual, the accusation of corruption arrives right on schedule — because when the data are inconvenient, the conspiracy must do the lifting. Is this guy really a MD? I am but I’m easy to look up and don’t hide
Terry’s lying (of course), but is also indirectly attempting to justify the unjustifiable: giving Hepatitis B shots to a day-old newborn. There’s literally NO justification for this, as they already know the mom doesn’t have it, plus any immunity has worn off by the teen years, when it actually may come in handy. People like Terry are nothing but pHARMa shills, having sold their souls for the Benjamins. Beyond pathetic.
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RT @PeterHotez: So MAHA is not happy that by debunking their pseudoscience, I hurt the sales of their ivermectin, hydroxychloroquine, fenbe…
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RT @PeterHotez: 1/n Let’s recount his public statements made in 2025 when he was HHS Scty during our awful measles epidemic in Texas and h…
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David Harker, MD, FAAD retweeted
This is what happens when you have an attorney who thinks they understand the meaning of a placebo - and he clearly does not. So let us address this silly man's concerns. The Salk polio vaccine trial did not use “plain saline” in every arm because the goal was not to create a metaphysical definition of “nothing”—it was to match the experience of injection so that outcomes weren’t biased by who got a shot and who didn’t. So yes, the control injection contained the vehicle—the same background solution used to deliver the vaccine—without the active poliovirus antigen. That’s how you isolate the effect of the vaccine itself. Calling that “not a placebo” is like claiming a sugar pill isn’t a placebo because it contains sugar. The ingredients being waved around—culture medium, trace antibiotics, stabilizers—were non-active components, included to mirror the injection environment. They are not the intervention. They are the baseline. And here’s the part that ruins the conspiracy: The trial involved over a million children and showed a clear, dramatic reduction in paralytic polio in the vaccinated group. Not subtle. Not arguable. Follow that with real-world data and the result is unmistakable: polio cases collapsed. If this were some grand deception built on a “fake placebo,” it would have fallen apart the moment the vaccine hit the real world. Instead, it eradicated a disease. Or to put it plainly: when someone argues that a controlled trial isn’t controlled because the control wasn’t philosophically pure enough, they’re not doing science, they are not understanding science, and they do not know the meaning of a placebo. Yes, this was not saline - but it was a placebo. Yes this is just as good as a saline control and this is the issue - Siri has no idea what a placebo is and if he thinks saline is a placebo then it shows why lawyers should take some basic science
A "Saline Placebo" was never used in the Salk vaccine trial. The below page is from the official final report for the Salk trial that expressly explains what the control group received in that trial. It was an injection that included, among other things, the following ingredients: “199 solution” (a synthetic tissue culture medium and ethanol), “phenol red,” “antibiotics,” and “formalin.” (Don’t take my word for it, see the full report for yourself: babel.hathitrust.org/cgi/pt?…) Also note that FDA, in its guidance regarding placebo trials, states: “Placebos, defined as inert substances with no pharmacologic activity…” and that a “placebo control … group ... receives an inert treatment…” Or as CDC explains: “A substance or treatment that has no effect on living beings.” For source links and more see aaronsiri.substack.com/p/fac… and aaronsiri.substack.com/p/no-…
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David Harker, MD, FAAD retweeted
Dermatologists be like: “palpable pruritic purpuric patches of papules and pustules parading partially past the platysmal plane alongside prominent plaques of pedal petechiae”
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David Harker, MD, FAAD retweeted
“We do these things not because they are easy, but because they are hard.” Godspeed, Artemis II.
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David Harker, MD, FAAD retweeted
I hate to give airplay to misinformation, but the following post is still online - hasn’t been deleted - and it’s from the person who is currently nominated to be Surgeon General of the United States- who btw doesn’t have an active medical license. This post alone should be disqualifying for the job. Here are the dangerous factual errors in the post: 1) Hep B is not transmitted exclusively through needles and sex; it can also spread perinatally from mother to child, through household contacts sharing items, or other blood exposures. 2) Even if parents test negative, testing isn't perfect - late infections, errors, or incomplete records can and do occur, risking newborns who have a 90% chance of chronic infection if exposed 3) Her claim of zero documented cases from infected playground needles: While rare, there are cases of Hep B transmission from community needlesticks in children. 4) The virus CAN survive on surfaces/needles - up to 7 days or more. 5) Far from "insanity" or "no benefit," the birth dose has reduced U.S. childhood Hep B infections by >95%, preventing cirrhosis and liver cancer. America can’t afford a Surgeon General who so boldly states clear and harmful misinformation, much less someone who doesn’t even feel the need to remove such online falsehoods WHILE AWAITING A CONFIRMATION VOTE. 🤦🏽‍♂️
The idea of giving a newborn the hepatitis B vaccine (followed by 2 additional doses) if the baby is born to parents *without hepatitis B* is absolute insanity and should make every American pause and question the healthcare system’s mandates. The disease is transmitted through needles and sex exclusively. There is no benefit to the baby or the wider population for a child to get this vaccine who is not at risk for sexual or IV transmission. There is only risk. Kids who don’t have this unnecessary pharmaceutical can’t go to school in many states. EVERYONE should become curious about why these interventions are institutionally jammed down our throats and people are made to be heretical whackos for questioning it.
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David Harker, MD, FAAD retweeted
Takeaways from Hegseth’s press conference this morning: 1. There is no strategic goal. He said this isn’t about “regime change” despite the President saying otherwise, repeatedly. That means they can't explain how all of this makes Americans safer in the end. 2. He said “this will end on the President’s choosing,” and provided no real timeline. That reinforces that there is no plan and no strategic goal, just a 79 year old man who spends too much time in a ballroom in Florida deciding when to stop this. 3. Hegseth suggested the Commander-in-Chief is setting the operational tempo — which is really high right now, putting a lot of stress on our troops and systems. Donald Trump, despite what he may believe, doesn’t have the capacity to make these types of operational decisions that have real consequences for commanders and servicemembers. 4. And finally, going into a conflict of this scale with no strategy and a wishy-washy end state often leads to a less than optimal outcome, starting with the potential for continued escalation and a long, bloody conflict. Americans want leaders who focus on improving their lives, not starting more wars. It’s clear to me and everyone else who is paying attention that this President needs to be reined in, but that’s not going to come from this Secretary of Defense, who has tough sounding talking points but little else to offer the American people or our servicemembers.
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Hey @ICEgov maybe you should try this very standard and rational approach when your agents shoot someone. Props to our local PD.
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RT @PeterHotez: Remember the MAHA movement is a system of pseudoscience/grifting to finance wellness influencers. To push their various sna…
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David Harker, MD, FAAD retweeted
Troops from European countries are arriving in Greenland to defend the territory from us. Let that sink in. And now Trump is setting tariffs on our allies, making you pay more to try to get territory we don’t need. The damage this President is doing to our reputation and our relationships is growing, making us less safe. If something doesn’t change we will be on our own with adversaries and enemies in every direction. Republicans in Congress need to stand up to Trump.
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A leader who truly cared about justice, law, and order would say, “Today a federal officer killed a woman while on duty. We take this very seriously and a full investigation is underway. While the investigation is ongoing, the officer in question has been placed on leave.”
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David Harker, MD, FAAD retweeted
ARE YOU KIDDING ME!? 🤯 📺 peacock
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