David Geier

David A. Geier
Born1980 (age 45–46)
EducationUniversity of Maryland, Baltimore County B.A.
Known forAnti-vaccine activism
Alternative autism treatments
Autism-related pseudoscience
FatherMark Geier

David Geier is an American anti-vaccine activist. He is the son of fellow anti-vaccine activist Mark Geier. In 2025, he was hired by United States Secretary of Health and Human Services Robert F. Kennedy Jr. to search for evidence that federal officials had hidden information that supported the thoroughly debunked claim that vaccines cause autism. Geier previously worked with his father to promote and perform discredited alternative autism treatments and was fined in 2011 for practicing medicine without a license.

Early life and education

Geier's parents were Mark Geier and Anne Geier. He grew up learning science from his father and tennis from both parents. He attended the University of Maryland, Baltimore County starting in 1998; he received a B.A. in biology, and has taken graduate courses, but does not have any graduate degrees.

Career

Geier followed in his father's pseudoscientific footsteps by advocating against vaccines—particularly those containing thiomersal (a harmless preservative)—and performing and promoting quack alternative autism treatments (such as chelation therapy and Lupron shots). He was fined by the Maryland Board of Physicians for practicing medicine without a license in 2011.

In March 2025, Geier was contracted as a senior data analyst by United States Secretary of Health and Human Services Robert F. Kennedy Jr., who said Geier was going to examine CDC vaccine safety data. Geier and his father had previously accessed this data and then been barred for misrepresenting their plans. The Intelligencer reported in July 2025 that inside sources thought Geier would try to repeat a study that showed a statistically insignificant link between infant vaccines and neurodevelopmental disorders.

References

  1. ↑ Weil, Elizabeth (2025-07-17). "The Father-and-Son Duo Who Toppled Our Trust in Vaccines". Intelligencer. Retrieved 2025-10-10.
  2. ↑ Salmon, Daniel (2025-03-19). "Vaccines Do Not Cause Autism". Johns Hopkins Bloomberg School of Public Health. Retrieved 2026-09-18.
  3. ↑ Offit, Paul (2025-09-27). "Vaccines and autism". Children's Hospital of Philadelphia. Archived from the original on 2026-09-10. Retrieved 2026-09-18.
  4. ↑ "No. Vaccines do not cause autism. Deconstructing the myth." Immunize Canada. 2026-03-05. Retrieved 2026-09-18.
  5. ↑ Mosbergen, Liz Essley Whyte and Dominique (2025-06-06). "Vaccine Opponent Hired by RFK Jr. Scours Official Records for Link to Autism". The Wall Street Journal. Retrieved 2025-10-10.
  6. ↑ "Vaccine skeptic hired to head federal study of immunizations and autism". The Washington Post. 2025-03-25. ISSN 0190-8286. Retrieved 2025-10-10.
  7. 1 2 3 Weil, Elizabeth (2025-07-17). "The Father-and-Son Duo Who Toppled Our Trust in Vaccines". Intelligencer. Retrieved 2025-10-10.
  8. ↑ Offit, Paul A. (2026-07-13). "Vaccine Ingredients: Thimerosal". Children's Hospital of Philadelphia. Archived from the original on 2026-08-20. Retrieved 2026-09-18.
  9. ↑ "Fact Checked: Extensive Research Shows Thimerosal is Safe". American Academy of Pediatrics. 2025-07-15. Retrieved 2026-09-18.
  10. ↑ "In the Matter of David A. Geier before the Maryland State Board of Physicians" (PDF).
  11. 1 2 3 Mole, Beth (2025-06-06). "Anti-vaccine quack hired by RFK Jr. has started work at the health department". Ars Technica. Retrieved 2025-10-10.
  12. ↑ Aboulenein, Ahmed; Aboulenein, Ahmed (2026-04-22). "US Health Secretary Kennedy to share David Geier's HHS contract with senators by week's end". Reuters. Retrieved 2026-09-18.