Many people have come to trust and endorse the social media public health influencer “Health Nerd.” This is odd, as Gideon Meyerowitz-Katz is an Australian-based laptop-class epidemiologist with ties to the American Council on Science and Health, which is partly funded by the Koch oil dynasty and has engaged in climate science denial. Reporting from 2021 by Walker Bragman and Alex Kotch for The Lever has found that Koch money was spread far & wide to sabotage the COVID-19 response.
So just how did the “Health Nerd” geek out on spewing COVID-19 disinformation?
Wrong From the Start
On February 2nd, 2020, the “Health Nerd” attempted to launch a poetry career from the anti-intellectual sewers of Twitter:
This myth was already disproven thanks to a massive wave of COVID-19 deaths in China, and immediately disproven mere weeks after Gideon posted it. He offered no apology for such a repulsive serenade and applied none of the well-earned humility to his many future proclamations.
Yet, many considered him credible, even after a tweet thread on July 11th, 2020 falsely claiming that SARS-CoV-2 is not airborne:
“Broadly speaking, I think this is where the basic scientists and epidemiologists are coming into conflict. Saying ‘this is how aerosols work!’ is meaningless if you don’t engage in contact tracing investigations looking at how the virus ~actually spreads~. For example, if there was substantial aerosol spread from particles hanging around in the air, we’d expect a large proportion of cases that cannot be traced back to a specific case. Instead, we find exactly the opposite!”
That’s…cute. Very quickly, the overwhelming scientific consensus became understood that SARS-CoV-2 is transmitted via aerosols. Another massive swing and a miss for the “Health Nerd.” Gideon again offered no apology to the “basic scientists.” Instead, he built himself a lucrative brand and significant following as the “Health Nerd,” seemingly offering level-headed and science-based guidance on all things COVID-19. Powerful and influential people came to endorse his views.
Downplaying & Dice-Rolling
A prime example of this is on September 26th, 2023, Biden’s Former & Final COVID Czar Ashish Jha endorsed an article by the “Health Nerd” which falsely claimed that Long COVID was magically going away on its own via waves of population-wide reinfection. Jha tweeted out, formatted for legibility:
“If you got COVID today, How likely are you to get Long COVID (symptoms > 3 months)? About 1 in 100. And how likely are you to get LC that substantially affects your life? About 1 in 500. Incidence of LC seems to be declining.”
Gideon will make a butchered comparison to tabletop roleplaying game multi-sided dice, claiming that repeated COVID-19 infections severely lowered your risk of developing Long COVID from a “d20” to a “d100.” This does little to help the people developing chronic illness and disability upon their third or fifth bout with the virus, lacking any treatment, cure, or support.
Ashish Jha apparently didn’t do the due diligence read criticism posted just two days earlier on September 24th, when Dr. Deepti Gurdasani from the United Kingdom pointed out the obvious errors in Gideon’s analysis:
“No, this is incorrect methodology. ONS itself puts this estimate at 4% for omicron in triple vaxed, and nearly 4% for activity limiting. One cannot subtract two prevalances to get an incidence- you need to model recovery as well, which your model doesn’t do.”
This is the sort of basic, basic error that an epidemiologist should not be making unless they are either dangerously incompetent or willfully misleading the public. Yet, he was allowed to falsely claim in The Guardian that “...the long term risk from a current infection is 10 times less than it was in 2020-21” while feigning concern about how “a lot of people are still suffering after getting Covid early in the pandemic.”
Gideon will go on in May 2025 to argue that American children do not need to be vaccinated against COVID-19, because... the United Kingdom and Australia don’t. This is not an argument based in science, and when confronted with a compilation of dozens of research studies showing the impacts of COVID-19 on pediatric health & development, Gideon casually wrote them off:
Yes, this is a supposed epidemiologist writing off a mountain of medical research on the negative impacts of COVID-19 on children as a “complete waste of time,” insisting that his own worthless opinion editorial about why he doesn’t care about his daughter getting COVID-19 repeatedly trumps hard scientific data. A supposed “Health Nerd” doesn’t want to bother “nerding out” on the topic he markets himself as an expert on. This is what happens when you prioritize being an influencer over a commitment to scientific reasoning.
Revenge of the Cherry-Pickers
Fast-forward to November 3rd, 2026 and the “Health Nerd” tweets out a link to his new Substack article, titled: “Is Long COVID Less Of A Problem Than We Thought? A new study looks at the question of what long-term symptoms COVID-19 actually causes.” Well, a single study invalidating a mountain of research on Long COVID would be quite an unprecedented event! Gideon had better hope that this is a damned good research paper, or he’s going to look quite foolish again!
Long-time readers of the Pandemic Accountability Index will have learned that COVID-19 denialists such as Emily Oster, Vinay Prasad, and others love to cherry pick single, heavily flawed studies to try & rebuke a growing mountain of evidence. Just as economist Jay Bhattacharya tried to claim that 9 is a larger number than 123, these fraudsters love to insist that single studies which align with their views invalidate a far larger body of contradictory evidence, of which you can read some of for yourself here:
Let’s look at this individual research article that Gideon is highlighting, titled: “Revised estimates of types and duration of long COVID symptoms based on claims records from 245 million US patients.” For starters, the enrollment period for Gideon’s cherry-picked study was from March 2020 to March 2021, when Long COVID was relatively new & poorly understood. In October 2021, the Centers for Disease Control & Prevention’s National Center for Health Statistics introduced the “Post COVID-19 condition, specified” ICD code. A World Health Organization study from that same month found 28 symptoms that fell under the Long COVID umbrella. The study “Health Nerd” is endorsing looks solely at insurance claims from this limited time when Long COVID was poorly understood.
Worse yet, we have an Australian epidemiologist claiming that 2020-2021 data from American health insurance companies, some of the most despised institutions in the country, is in fact more reputable and trustworthy than the mountains of medical research that has been published since. Just ask any of the millions of Americans suffering from chronic illness how they feel about dealing with their health insurance.
Failing to acknowledge these severe limitations, and the mountain of research about Long COVID that is still being published to this day, Gideon foolishly claims that:
“...the analysis also shows that most of the worries when it came to Long COVId were unfounded. COVID-19 impacts your short-term risk of health problems, but the evidence is not strong for the majority of other issues. There is probably no additional risk for mental health, metabolic, or a range of other health concerns that is caused by having a COVID-19 infection ... these health problems are probably caused by something other than COVID-19 ... many of the proposed secondary impacts of COVID-19 were not actually related to the disease.”
The abuse of the term “probably” is the load-bearing drywall of this “Health Nerd’s” epidemiology. This is not the analysis of a serious adult. This is retroactively defending the poor political decisions that led to a much higher threshold of disease, disability, and death. One small problem is that Gideon cannot identify what he thinks is actually causing this massive uptick in disability as tracked by the U.S. Bureau of Labor Statistics:
I guess we’re supposed to think that they’re all just faking it for attention. Actually, he did try to make this argument in 2023, sharing a fraudulent opinion editorial by Natalie Shure for The New Republic which tried to write off Long COVID as merely psychosomatic, and was soundly criticized by hundreds of doctors, scientists, journalists, and patients in the Public Herald:
It sure seems that the “Health Nerd” does not actually read Long COVID research.
Final Verdict
At this point, we have established that over a series of years, Gideon “Health Nerd” Meyerowitz-Katz has wasted years being dead wrong about everything COVID-19, regularly committing critical flaws in his analysis to mislead his audience. A real “nerd” for public health would strive to seek out their errors and attain as much knowledge as possible, correcting their errors as they went along. Instead, Gideon has chosen the way of pain.
To call yourself an epidemiologist and casually dismiss a growing mountain of research on Long COVID, as well as the impacts of COVID-19 on pediatric health & development, against cherry-picked single studies with significant flaws and your own useless opinion pieces, is utterly obscene. You are selling yourself as something that you are clearly not; this is not reliable public health guidance - but instead some rather deceptive brand-building.
Gideon Meyerowitz-Katz, like many other laptop class academics, has been dead wrong about almost everything COVID-19 since day one. The fact that he still markets himself as an authority on the topic in 2026 is disgraceful. When will public health finally rid itself of the egotistical wannabe influencer charlatans?
