Studies and Research
The body of research on the effects of intramuscular injections is vast and detailed. However, the highly technical language in these studies can be difficult for the general public to understand.
In public health research, authors often soften their wording due to pressure from journals to downplay negative findings on side effects and adverse reactions. As a result, important insights are frequently obscured or carefully phrased in the papers themselves—though they remain visible in the data sets and discussion sections upon close review.
To address this, HFDF has created this searchable compendium of studies, each paired with clear, plain-language summaries and notes prepared by our team. Our goal is to cut through technical complexity, bias, and ambiguity so individuals can access the key facts and make informed health decisions.
This resource will continue to grow, with new studies and improvements added regularly.
Please note that HFDF does not necessarily endorse or support any policy arguments or specific assumptions made by the authors. HFDF commentary describes and summarizes the role this study plays in the scientific discourse and provides abbreviated notes.
Recently Posted Studies
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Circulating Microclots Are Structurally Associated With Neutrophil Extracellular Traps and Their Amounts Are Elevated in Long COVID Patients
In this study, the authors try to focus on “long covid”, but 94% of all participants were recipients of mRNA shots, and of these,100% of these had amyloid microclots including in the non-“long covid” control arm.
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Top 10 drugs most frequently associated with adverse events of myocarditis and pericarditis
This study highlights the unique danger from mRNA shots, of events like myocarditis and pericarditis, compared to other pharmaceutical products.
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First-Trimester mRNA COVID-19 Vaccination and Risk of Major Congenital Anomalies
Journal: JAMA Netw OpenLead Author:
Clément Bernard, et al.Original date of publication:
10/15/2025This is an instructive study on how data can be manipulated in a peer reviewed journal through exclusion– in this case, any fetus with a severe enough defect to lead to termination or fetal death was ignored. Statistical tests suggest hiding of signal.
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Association of SARS-CoV-2 vaccination status with risk of influenza-like illness and loss of workdays in healthcare workers.
Lead Author:
Dörr, et al.Original date of publication:
08/09/2025Study of 1,745 healthcare workers finds mRNA boosters raise risk of influenza-like illness by up to 70% and increase workdays lost by 50%.








