Unvaccinated Under God: Kira Ganga Kieffer on Religion and Vaccine Hesitancy in Modern America

“Vaccine hesitancy in the U.S. should be understood as religious expression — not as the product of scientific misinformation. These debates have been proxies for existential concerns about justice and morality.” — Kira Ganga Kieffer

Are anti-vaxxers simply bizarre anti-science crazies egged on by conspiracists like RFK Jr? For Kira Ganga Kieffer, author of Unvaccinated Under God, what she calls “vaccine hesitancy” in America is actually a more complicated and prescient affair.

The prevailing narrative — that vaccine-hesitant people lack scientific facts or serve their own individual agendas — misunderstands what’s actually happening. Kieffer’s argument is that vaccine hesitancy is best understood as a kind of religiosity. Not in the narrow context of church doctrine, but in the broader sense of meaning-making, moral reasoning, and an intensely individualist relationship with the body that is deeply rooted in American evangelical and alternative-spiritual tradition.

This hesitancy, Kieffer shows, is not new. It has been present since the smallpox vaccine in the eighteenth century. What recurs across very different eras and very different communities is a set of metaphysical rather than scientific concerns expressed in the language of wellness, purity, and bodily sovereignty.

The most interesting political implication of Kieffer’s argument is that the same hyperindividualistic anti-modern instinct behind vaccine hesitancy also drives the wellness movement, the rejection of AI, and the political coalition that coalesced around RFK Jr. She sees this as a broad and growing constituency that neither party has fully understood nor spoken to. Rather than crazies, today’s anti-vaxxers might offer a window onto tomorrow’s American politics.

Five Takeaways

•       Vaccine Hesitancy Is Moral Meaning-Making, Not Ignorance: The dominant public health framing: vaccine-hesitant people lack scientific knowledge. Kieffer’s reframe: they are engaged in profound moral reasoning about the body, purity, parental responsibility, and the relationship between the individual and the state. The parent who fears the MMR vaccine is not asking a scientific question. They are asking: if I consent to this intervention and my child is harmed, am I responsible? That is a theological question — about guilt, intention, and moral agency — dressed in the language of health.

•       Evangelical Hyperindividualism Is the Root: Kieffer’s structural argument: American evangelical Christianity is, at its core, an individualist proposition. You are saved by your personal choices. This translates directly into the wellness culture’s logic of bodily salvation: you are saved from illness, aging, and death by your personal choices about diet, supplements, and vaccines. The individual body becomes the site of spiritual as well as physical salvation. This hyperindividualism is very American — and very old. It predates the wellness movement and will outlast it.

•       Vaccine Hesitancy Has Been Present Since the Eighteenth Century: Kieffer’s most important historical corrective: vaccine hesitancy did not begin with COVID, with MMR, or with the anti-vaccine movement of the 1990s. It has been present since the smallpox inoculations of colonial Massachusetts. What recurs across very different eras is not the same people or the same science — it’s the same core concerns: bodily purity, parental moral responsibility, and distrust of external authority over the body. Each generation clothes these concerns in the available language. Today it is wellness. Earlier it was religious freedom.</