RFK Jr.’s rejection of germ theory debunked in Senate hearing

Source: Ars Technica

Senate Hearing Highlights

In a Congressional hearing on Wednesday, Senator Bernie Sanders (I‑VT) directly confronted anti‑vaccine Health Secretary Robert F. Kennedy Jr. on his rejection of germ theory—the well‑established scientific principle that specific pathogenic microbes cause specific diseases. After Kennedy defended his fringe view, Senator Bill Cassidy fact‑checked and debunked Kennedy’s denialist arguments in real time.

The exchange marks a rare instance of Kennedy’s dismissal of germ theory being raised in such a high‑profile public setting, namely a hearing of the Senate Committee on Health, Education, Labor, and Pensions. Kennedy, who has no background in science, medicine, or public health, is widely known as an ardent anti‑vaccine activist and promoter of conspiracy theories. His startling rejection of a cornerstone theory in biomedical science has largely been underreported.

Kennedy’s Germ Theory Denialism

As reported by Ars Technica last year, Kennedy wrote about his germ‑theory denialism explicitly in his 2021 book The Real Anthony Fauci (Ars Technica article). In the book, he maligns germ theory as a tool of pharmaceutical companies, scientists, and doctors to promote modern medicines. Instead of accepting germ theory, Kennedy promotes a concept akin to the discarded terrain theory, which holds that diseases stem from imbalances in the body’s internal “terrain” rather than from germs. He attributes those imbalances to poor nutrition, exposure to environmental toxins, and stressors. (Kennedy mistakenly labels this as “miasma theory,” a different historical theory that attributes disease to bad air or vapors from decaying matter. Miasma theory was supplanted by germ theory, while terrain theory never gained wide acceptance.)

Terrain Theory vs. Germ Theory

• Germ Theory: Specific microorganisms cause specific diseases; supported by extensive experimental evidence and the basis of modern microbiology, vaccines, and antimicrobial therapies.
• Terrain Theory: Disease results from an unhealthy internal environment; focuses on nutrition, toxins, and lifestyle factors. Lacks empirical support as a primary cause of infectious disease.
• Miasma Theory: Historical belief that disease spreads through polluted air; largely discredited after germ theory’s acceptance.

Kennedy’s embrace of terrain theory over germ theory underpins the priorities of his Make America Healthy Again (MAHA) movement.

Impact on the MAHA Movement

Kennedy’s MAHA movement promotes:

• Healthy diets and lifestyles, emphasizing whole foods (including higher amounts of saturated fat) while vilifying artificial ingredients and additives.
• Personal fitness, often showcased through videos of his own workouts on social media.
• Environmental advocacy, reflecting his background as an environmental lawyer, with a long history of opposing chemical pollutants and pesticides, particularly glyphosate. (Note: Kennedy recently shifted his stance on glyphosate, now supporting increased production in line with former President Trump’s policies.)

As Health Secretary, Kennedy has focused on revamping federal dietary guidance in line with these principles, despite the scientific community’s consensus on the importance of germ theory for public health policy.