The following is an opinion piece by attorney Aaron Siri. It is republished as commentary and reflects the author’s claims and interpretation of the cited whistleblower litigation and outbreak data.
By Aaron Siri | 25 September 2026
On the topic of splitting up the MMR vaccine into 3 separate vaccines, everyone should know that in 2012, two Merck virologists came forward and explained that when Merck sought to change the label on its MMR vaccine and approval for ProQuad (a combination MMR and varicella vaccine), it “falsely certified as having an efficacy rate that is significantly higher than it actually is.” (See Complaint ¶ 1.)
As detailed in the whistleblower lawsuit, Merck obtained a license for its mumps vaccine in 1967. (Comp. ¶ 16.) In the late 1990s, to obtain approval for ProQuad and change the label on its MMR vaccine, Merck needed to reconfirm its claims of efficacy for its mumps vaccine made thirty years prior. (Comp. ¶ 22.) Two of Merck’s virologists working on testing the efficacy of the mumps vaccine revealed that after Merck could not demonstrate a 95% efficacy for its mumps vaccine, the results were simply fraudulently falsified to achieve this result. (Comp. ¶¶ 15-131.)
As explained by the virologists, Merck took blood samples pre-vaccinated with the mumps vaccine and then exposed them to the mumps virus. (Comp. ¶¶ 25-28.) Suspecting a test against a live strain of mumps would not yield a 95% efficacy, Merck tried to improperly obtain this rate using an attenuated strain of the mumps virus. (Comp. ¶¶ 29-30.) When that would not achieve 95% efficacy, Merck tried different virus dilutions, different straining procedure, and even more liberal counting techniques. (Comp. ¶¶ 31-32.) The Merck lab even improperly added animal antibodies to the blood samples and still could not achieve a 95% efficacy rate. (Comp. ¶¶ 33-39.)
When it was clear that even improper testing techniques could not produce the desired result, the test reports were simply falsified. (Comp. ¶¶ 40-51.) According to the Merck virologists, to document the desired efficacy rate, Merck destroyed result sheets and falsified various documents. (Id.) The Merck virologists claim this fraud was done with the direct authority and approval of Merck’s senior management. (Comp. ¶¶ 52-58.)
Now you know.
This may explain why outbreaks of mumps still regularly occur in highly vaccinated populations. See, e.g.:
Complaint
Source
Aaron Siri, Merck Virologists Admitted to Falsely Certifying Vaccine Efficacy, 25 September 2026.
Original article
Editor’s note: This article reports allegations made by former Merck virologists in whistleblower litigation. Allegations contained in a legal complaint are not, by themselves, judicial findings that the alleged conduct occurred. The piece is published as the author’s opinion and should be read in that context.