Stanford Medicine study shows why mRNA COVID-19 vaccine can cause myocarditis
Stanford Medicine investigators have unearthed the biological process by which mRNA-based vaccines for COVID-19 can cause heart damage in some young men and adolescents — and they’ve shown a possible route to reducing its likelihood.
Using advanced but now common lab technologies, along with published data from vaccinated individuals, the researchers identified a two-step sequence in which these vaccines activate a certain type of immune cell, in turn riling up another type of immune cell. The resulting inflammatory activity directly injures heart muscle cells, while triggering further inflammatory damage.
@AnwaltUlbrich (translated from German);
Six years after the global rollout of mRNA vaccines, established science is finally admitting what affected individuals, critical physicians, and independent researchers have been saying for a long time: the mechanism of action of these vaccines was fundamentally misunderstood from the very beginning. Anyone who said so until now was considered an outsider. Today, it is featured in Nature Biotechnology.
The Bombshell from Mount Sinai
On April 29, 2026, researchers led by Prof. Brian D. Brown, Director of the Icahn Genomics Institute at Mount Sinai Hospital in New York, published the paper
“mRNA vaccine immunity is enhanced by hepatocyte detargeting and not dependent on dendritic cell expression” (Marks et al., DOI: 10.1038/s41587-026-03099-z).
The senior author himself summarizes the implications with a candor that is sure to raise eyebrows:
“This study fundamentally changes how we think mRNA vaccines work.”
And elsewhere: “That was unexpected.” — six years after billions of doses administered to humans. […]
The researchers documented:
1. massive T-cell infiltration into liver tissue (around 1,100 CD8 T cells per mm²)
2. significantly elevated liver values ALT and AST — the classic clinical markers for liver cell damage
3. a clear increase in apoptotic cells (Caspase-3 cleavage)
The authors state in the discussion with remarkable directness:
“It is possible, however, that muscle or hepatocyte damage may also occur with RNA-LNP treatments in multi-dose or CAR-T cell applications, which are difficult to detect but limit the therapeutic index by pushing up the dose ceiling.”
In plain English: Damage can occur — it’s just hard to find. This is something fundamentally different from the formula repeated for years: “safe and effective.”
And more. Via Tim Pool.
