Elisabeth Marnik Builds Vaccine Advocacy Around Empathy, After Growing Up Unvaccinated

At 23, Elisabeth Marnik asked a doctor for something unusual: vaccination against everything. She had not received a single vaccine as a child, having grown up in a household where her mother distrusted science and rejected immunization.

That personal break with her upbringing now sits at the center of Marnik’s public role in vaccine communication. At 37, with a Ph.D. in immunology, she is using her own history to argue that public health messaging works better when it combines scientific accuracy with empathy for people who are hesitant, rather than treating them as unreachable.

Her path into science communication

Marnik’s childhood in Thomaston, Conn., unfolded in a family life centered on an evangelical church in Waterbury. She and her younger brother were not vaccinated. They were pulled out of elementary school before classmates were set to read Harry Potter, were not allowed Halloween costumes or Disney movies, and were taught that creation literally occurred over seven days and that science and scientists could not be trusted.

The family also faced financial strain. Her parents split when she was young. Her mother did not work, and her father, while paying rent, was mostly absent. Marnik later described becoming obese as cheap boxed foods displaced fresh produce in the family diet.

Her education was fragmented. She and her brother were homeschooled informally for three years, and she later attended a private Christian school for a period until the family could no longer afford it. She eventually convinced her grandmother to buy her a homeschooling course, which she completed on her own, grading her own quizzes, before persuading her mother to let her enroll in public school starting with her junior year.

The decision to get vaccinated came later, after she turned away from her childhood beliefs. Because an adult physician does not typically stock childhood immunizations, she went to a travel clinic and ultimately received the previously forbidden shots. She did not tell her mother for a year.

The communication model

Marnik’s current message is shaped not only by rejecting anti-vaccine beliefs, but by understanding how they take hold. Her mother, Teresa Ryan, recalled reading a pamphlet about a child who became ill after vaccination and getting little reassurance from a doctor beyond insistence on following the immunization schedule. Ryan decided her children would not get those shots.

Marnik argues that facts alone rarely change minds, even though strong evidence shows vaccines are safe. That belief informs how she communicates now through her Instagram account, where she has 64,000 followers as @ScienceWhizLiz, and through her Substack, The Science Classroom, which has 4,500 subscribers. Since February, she has also served as executive director of The Evidence Collective, a group of clinicians and scientists active on social media who coordinate efforts to communicate accurate public health information.

Her approach is to explain science through stories, often from her own life, and to urge people who already support vaccines to show patience toward doubters. Jennifer Reich, a sociology professor at the University of Colorado, Denver, and author of "Calling the Shots: Why Parents Reject Vaccines," said Marnik’s willingness to share the journey she and her family went through is a valuable contribution to the conversation.

Why the message changed

Marnik said motherhood altered how she viewed her own mother’s decisions. In 2019, after a difficult childbirth that required several blood transfusions, she hesitated when a nurse asked to give her baby a hepatitis B shot. A friend reminded her why birth vaccination matters, and the baby received the shot before leaving the hospital.

For Marnik, that moment complicated a simpler story of science versus misinformation. She said the pressure of becoming a parent gave her more compassion for how fear can shape decisions, even when evidence is strong.

That shift is the clearest signal in her story. Public health communication often treats persuasion as mainly a problem of supplying better facts. Marnik’s career suggests a narrower but more practical conclusion: the messenger’s credibility may depend as much on demonstrating recognition of fear, family history and social identity as on reciting evidence. In vaccine debates, that does not replace science; it may determine whether science gets a hearing.