Maryanne Demasi, PhD Profile picture
Investigative journalist, PhD, Researcher, TV presenter/producer, ex-@ABCTV. @Brownstoneinst Fellow. Subscribe to my Substack 👇🏼
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Nov 27 4 tweets 2 min read
🚨Major journal under fire for omitting Pfizer’s failed flu data in seniors

Pfizer’s mRNA flu shot failed in the over-65s, but the @NEJM never published the data — prompting calls for accountability.

STORY LINK 👇👇
@RobertKennedyJr @RetsefL
@newstart_2024 @maryhollandnycImage This week, I reported that @pfizer's mRNA flu shot offered almost no clinical benefit in adults aged 18–64 compared to a traditional flu shot. blog.maryannedemasi.com/p/pfizers-mrna…

But that was not the full story. @NEJM did not publish any data from over-65s in the same trial — the very population most at risk from influenza and the main reason these vaccines exist.

When @RetsefL discovered the missing data, he was stunned. “It seems like the reason for omitting the older participants was because the results were not favourable for the studied mRNA vaccine.”

Levi said omitting this data was “unacceptable, especially since the over-65s are among the high-risk populations that influenza vaccines aim to protect.”Image
Nov 25 6 tweets 3 min read
🔴Pfizer’s mRNA flu jab flops

ANALYSIS: Pfizer’s mRNA flu shot was supposed to revive confidence in the platform. Instead, its own trial results reinforce the view that mRNA is still nowhere near ready for prime time.

FULL STORY 👇👇
@RobertKennedyJr @VPrasadMDMPH
@newstart_2024 @RobSchneiderImage A major new trial of @pfizer's mRNA flu shot has landed — and despite flattering headlines, it is nowhere near the breakthrough the company hoped for.

The phase 3 study, published in the @NEJM
-57 cases of influenza-like illness in the mRNA group versus 87 in the comparator group (traditional flu shot, not saline placebo), producing a relative efficacy of 35%.

The absolute difference was tiny: 0.63% of the mRNA group developed symptoms compared with 0.95% of those who received the traditional vaccine.
(0.32% abs difference)
NNV: >300 people would need to be vaccinated to prevent a single mild, self-limiting illness

nejm.org/doi/full/10.10…Image
Nov 19 7 tweets 4 min read
🚨Prozac’s dark legacy: regulators ignored early warnings of sexual harm
Internal documents show Eli Lilly and regulators buried evidence that Prozac could permanently alter sexual development.
FULL STORY 👇👇
@maryhollandnyc @ACE_CoalitionEd @Honest_MedicineImage EARLY WARNINGS
A 2005 assessment by the Dutch Medicines Evaluation Board described a disturbing pattern in Eli Lilly’s own animal studies.

It found that juvenile rats exposed to fluoxetine showed delayed sexual maturation, degeneration of testicular tissue, and hormonal disruption.

They recommended against approval, concluding the benefit–risk balance was negative.Image
Nov 15 4 tweets 2 min read
🩺The menopause moment: progress or overcorrection?
LINK 👇
As the FDA lifts its black box warning on HRT, women are now being urged to begin treatment within ten years of menopause onset. Is this shift grounded in evidence or emotion?

@DrMakaryFDA
@LadySpaulding11
@MdBreathe
@KLVeritasImage When @US_FDA announced it was removing the black box warning from hormone replacement therapy (HRT), the media response was nothing short of euphoric.

Morning shows ran breathless coverage, and one female host even admitted she became “teary” after hearing the news. But is it a long-overdue correction or another swing of the pendulum from one extreme to the other?Image
Oct 23 11 tweets 7 min read
🧵The Weaponisation of Science
"The scientific process has been hollowed out by financial incentives, regulatory capture, and institutional cowardice."

LINK 👇👇
@MAHA_Action @Holden_Culotta @SecKennedyImage CENSORSHIP
I first saw this clearly in 2013 while investigating statins. My ABC documentary questioned whether statins were being overprescribed, and it unleashed a media firestorm.

The episode was pulled after industry outrage, and I was publicly attacked. None of the critics engaged with the evidence — they simply sought to silence it.
blog.maryannedemasi.com/p/heart-of-the…Image
Oct 15 8 tweets 4 min read
🔥Inside the Henry Ford vaccine controversy
The Henry Ford Health study comparing vaccinated and unvaccinated children was never published—until Congress forced it into the open.
Here’s what it found, and why it matters.
LINK below 👇👇

@AaronSiriSG @HenryFordHealth
@MdBreathe @Jikkyleaks @DowdEdward @newstart_2024Image The lead investigator, Dr Marcus Zervos, is a veteran infectious-disease specialist. During the Covid-19 pandemic, he was a regular on local news programs, promoting vaccination and defending public-health mandates.
His involvement gave the project an establishment credibility rarely seen in vaccine-safety research.Image
Oct 5 5 tweets 3 min read
🚨The HPV vaccine
A Scottish study was billed as ‘proof’ the HPV vaccine can wipe out cervical cancer. But a new analysis of the raw data shows it was nothing more than a statistical illusion.

LINK 👇👇
@RetsefL
@MdBreathe
@Jikkyleaks
@newstart_2024Image In January 2024, headlines erupted worldwide.
“No cervical cancer cases in HPV-vaccinated women,” declared @BBCNews, hailing a landmark breakthrough from Scotland.
A study in the @JNCI_Now claimed that girls who received the HPV vaccine at age 12 or 13 had not developed a single case of cervical cancer.Image
Oct 1 8 tweets 4 min read
🚨The Nature of hypocrisy: pharma-funded journals smearing independent voices
@Nature alleges that I endanger public health, but it is the journal — steeped in pharma money — that ought to be looking inward.

LINK 👇👇

@RetsefL @RWMaloneMD @Jikkyleaks
@TheChiefNerd @DowdEdward @weldeiry
@SciGuardians @Kevin_McKernan @MdBreatheImage According to the email, I was being lumped into an “anti-vaccine movement,” accused of “endangering public health,” and “profiting from disseminating misinformation.”

No evidence was provided. No articles were cited. No definition of “anti-vaccine” was offered. No complainants were named. Just blanket accusations intended as a character assassination.Image
Sep 23 6 tweets 3 min read
🚨Moderna misled ACIP on key safety studies
Biodistribution studies were never done on the Covid mRNA vaccine that people actually received — and when confronted with questions, Moderna lied to CDC’s vaccine advisers.
LINK BELOW 👇👇
@RetsefL @KUPERWASSERLAB @weldeiry @RWMaloneMD @Jikkyleaks @MdBreathe @RobSchneider @Honest_Medicine @DowdEdward
@HHS_JimImage Last week, two members of ACIP’s Covid vaccine work group, Prof Charlotte Kuperwasser & Prof Wafik El-Deiry, presented evidence @moderna_tx did not use its commercial vaccine for key biodistribution studies. Image
Sep 10 14 tweets 7 min read
🧵ACIP to probe DNA contamination in Covid-19 vaccines
DNA contamination in Covid vaccines is back in the spotlight, with a peer-reviewed study now before CDC advisers just days ahead of their pivotal vote.
LINK BELOW 👇👇

@SecKennedy @RetsefL @RWMaloneMD @HHS_Jim
@TheChiefNerd @Jikkyleaks @Kevin_McKernan @jimmy_dore @RobSchneiderImage The Advisory Committee on Immunisation Practices (ACIP) has formed a new Covid vaccine work group, chaired by MIT professor @RetsefL. Its Terms of Reference, published last month, explicitly list “DNA contamination” as an issue to be addressed.
blog.maryannedemasi.com/p/breaking-aci…Image
Sep 4 7 tweets 4 min read
While America panics, Europe quietly recalibrates Covid-19 vaccine policy
ATT: @SecKennedy @HHS_Jim @RandPaul @SenBillCassidy
From Sweden to the UK to Australia, countries are narrowing Covid-19 vaccine policies without controversy. So why the panic in the US?

@laralogan
@newstart_2024
@JikkyleaksImage The medical establishment has ramped up the rhetoric against @SecKennedy over narrowing Covid-19 vaccine policy. In @nytimes, 9 former @CDCgov directors warned that his decisions mean “children risk losing access to lifesaving vaccines.”

But US policy is only bringing American practice closer to what Europe has already done.Image
Aug 31 7 tweets 3 min read
💥EXCLUSIVE: Retsef Levi hits back after attacks on his leadership from departing CDC officials

Several top CDC officials quit in protest, denouncing @RetsefL’s leadership of the Covid vaccine work group. Now, in an exclusive interview, Levi reveals what really happened behind closed doors.

@HHS_Jim @SecKennedy @RWMaloneMD
@TheChiefNerdImage Dr Demetre Daskalakis, a top official who abruptly resigned from the CDC, posted his resignation letter on @X, now viewed more than 19 million times, declaring his position at the agency “untenable.”

He pointed to the new Terms of Reference for ACIP’s Covid vaccine work group, chaired by Levi, whom he attacked as a figure of “dubious intent and more dubious scientific rigor” who had “ignored all feedback from career staff at CDC.” blog.maryannedemasi.com/p/breaking-aci… @dr_demetreImage
Aug 29 5 tweets 3 min read
💥New investigation reveals @CDCgov inflated Covid threat level in kids as resignations rock the agency

After withholding key safety data on RSV antibodies, the nation’s top health agency is once again under fire — this time for presenting Covid data in ways that inflate the risk for children.
Link below 👇👇

@regardthefrost @SecKennedy
@RWMaloneMD @RetsefL
@TheChiefNerd @JikkyleaksImage Among the recent CDC resignations, @dr_demetre, former head of the National Center for Immunization and Respiratory Diseases, accused the new HHS leadership of “unskilled manipulation of data to achieve a political end rather than the good of the American people.”

But the hypocrisy is striking.

Daskalakis was one of the very officials responsible for liaising with ACIP while his own agency was withholding critical safety data on seizures in babies given Sanofi’s RSV monoclonal antibody, clesrovimab.Image
Aug 21 11 tweets 5 min read
💥BREAKING: ACIP launches sweeping Covid-19 vaccine review under Retsef Levi
Billions of Covid vaccine doses were rolled out on assurances they were safe and effective. Now, ACIP’s new Covid immunisation working group is asking the questions regulators never did. 👇👇

@RetsefL @FLSurgeonGen @TheChiefNerd @newstart_2024 @JikkyleaksImage MIT professor @RetsefL has been an outspoken voice on the @CDCgov's vaccine advisory committee (ACIP) since @SecKennedy's dramatic overhaul in June.

Levi has pressed CDC officials on uncomfortable questions, challenging the narrow surveillance windows used to track harms and insisting that delayed effects could not simply be ruled out.

He also raised concerns about the safety of RSV monoclonal antibodies after clinical trials showed a clear imbalance in infant deaths.Image
Aug 12 5 tweets 3 min read
❌RETRACTED: How a peer-reviewed study was killed by a “fact check”
When a medical journal starts outsourcing its editorial judgement to media fact-checkers, the entire premise of peer review collapses.

LINK below 👇👇
@newstart_2024 @Jikkyleaks @Kevin_McKernanImage In April 2024, a peer-reviewed study by Japanese researchers was published in @CureusMedical.

The study, led by Dr Miki Gibo, a primary care physician at the Matsubara Clinic in Kochi, Japan, found that in 2022 there was a statistically significant rise in deaths from certain cancers coinciding with the rollout of Covid-19 mRNA injections.

They made no claim of causation — only correlations — and outlined several possible explanations, including Covid-19 vaccination, lockdowns, and reduced cancer care.Image
Aug 5 5 tweets 2 min read
🔥EXCLUSIVE: Whistleblower says Merck ignored evidence linking Gardasil to autoimmune disease

New court filings reveal a clinical trial investigator tried to warn Merck of autoimmune injuries from Gardasil—but says the company shut him down.

LINK 👇👇
@Jikkyleaks @DrPatSoonShiong @WisnerBaum
@MdBreathe @newstart_2024 @TheChiefNerdImage Dr Jesper Mehlsen, a Danish physician and former Merck trial investigator, alerted the company to signs of autonomic dysfunction following vaccination.

According to Mehlsen, those warnings were “discarded.” Image
Jul 24 9 tweets 5 min read
🧵Is the war on saturated fat finally going to end?

They called us fringe. Dangerous. Irresponsible. But we were right about saturated fat. Is the medical establishment finally ready to admit it?
@SecKennedy @DrMakaryFDA @SecRollinsImage In 2013, I produced a two-part investigative series for @ABCTV Catalyst, examining the demonisation of saturated fat (part 1) and the widespread use of cholesterol-lowering drugs known as statins (part 2).

The first episode traced the origins of the diet-heart hypothesis and the work of Ancel Keys, whose Seven Countries Study laid the foundation for decades of dietary advice warning against saturated fat.

The medical dogma was firmly entrenched: saturated fat raised cholesterol, and cholesterol caused heart disease.

But the science behind it was shaky—built on cherry-picked data and upheld more by consensus than by critical evaluation.

The series featured experts like Dr Michael Eades, an early advocate for low-carb, high-fat diets; cardiologist Dr Stephen Sinatra; nutritionist Dr Jonny Bowden; science journalist Gary Taubes; and cardiologist Dr Ernest Curtis.Image
Jul 14 5 tweets 3 min read
🔥Exposing the rot: Journal ignores missing data on Covid vaccine safety in pregnancy

The study authors quietly excluded 22 vaccinated women from their final analysis, and the outcomes of those pregnancies were never disclosed. If included, the data could have dramatically altered the study’s conclusions.

LINK below👇👇
@RetsefL @JikkyleaksImage The 2022 study was widely used to reassure the public about the safety of Covid-19 vaccination during pregnancy.

It reported no increased risk of stillbirth or preterm birth among women who received Covid-19 mRNA vaccines during pregnancy compared to those who remained unvaccinated--BUT IT EXCLUDED 22 WOMEN WHO'D BEEN VACCINATED.
…pregnancychildbirth.biomedcentral.com/articles/10.11…Image
Jul 2 6 tweets 3 min read
🚨The 'plot' to take down RFK Jr looks familiar
A leaked memo published at @brownstoneinst reveals how powerful pharmaceutical interests are plotting to remove RFK Jr. from office. I’ve seen this playbook before—because a decade ago, they used it on me.

SEE BELOW:👇👇

@jeffreyatucker @lifebiomedguru @Jikkyleaks @newstart_2024
@TheChiefNerd @maryhollandnyc @ProfTimNoakesImage The document, reportedly from the Biotechnology Innovation Organization (BIO)—the largest pharmaceutical lobby group in the US—outlines a US$2mil campaign to “neutralise” Kennedy before September.
brownstone.org/articles/the-p…Image
Jun 24 5 tweets 3 min read
🛑The Cutter Incident - did we learn anything from the Covid vaccine rollout?

The Cutter Incident exposed a critical vulnerability in vaccine production- protocols that are safe & effective in the lab don’t always hold up under the pressures of large-scale manufacturing. 👇👇

@Jikkyleaks @RetsefL @Kevin_McKernanImage Salk’s inactivated POLIO vaccine was seen as a breakthrough - the US gov rushed to roll it out in 1955.

But in the haste to scale up production, oversight of the manufacturing process slipped.

One manufacturer, Cutter Laboratories, failed to properly inactivate the virus in some of its vaccine batches. The consequences were devastating.

Around 200,000 children received doses that inadvertently contained live poliovirus. More than 200 were paralysed. At least 10 died.Image
May 7 5 tweets 3 min read
🚨Merck rigged Gardasil trials to conceal harms, court documents reveal
A forensic analysis by @PGtzsche1 - now part of the official court record—lays bare a chilling narrative of clinical trial rigging, regulatory failure, and global deception.



@DrPatSoonShiong @TheChiefNerd @Jikkyleaks @MdBreathe @Liz_Wheelerblog.maryannedemasi.com/p/merck-rigged…Image Trials were designed to mislead

From the outset, @PGtzsche1 argues that Merck engineered its clinical trials not to detect harms, but to mask them.

Rather than using an inert placebo—such as saline solution, the gold standard in clinical research—Merck used an aluminium-based adjuvant as the control in all but two small trials.

And those two trials—marked with a red box below—showed a significantly greater incidence of harm compared to trials that used an aluminium adjuvant or a comparator vaccine as the "placebo."Image