GAPS, Childhood Disease and the Natural-Selection Argument

The GAPS book uses a natural-selection argument to explain why Dr. Natasha Campbell-McBride opposes abandoning childhood vaccination. She acknowledges the lives vaccination has saved, then argues for a different assessment and policy approach. That position deserves a precise account without turning childhood infection into a goal.^[1]

Why She Rejects Abandoning Vaccination

Her chapter describes the loss of children to infections before vaccination and says modern parents will not accept preventable deaths when protection is possible. She credits vaccination with saving millions of children’s lives. That is a distinct part of her position, alongside her criticisms of policy.^[1]

The Natural-Selection Argument

She frames historical deaths from childhood disease in terms of natural selection and survival. In her account, vaccination helps children survive infections that might otherwise have killed them. Within that natural-selection framing, she describes survivors as healthier and having stronger immune systems. Her conclusion is that abandoning vaccination would mean accepting that historical toll, so she calls for what she considers a more rational approach.^[1]

This is an argument about the policy she favors. Survival after an infection and stronger protection against other infections are different biological claims. One does not establish the other, and a child’s experience of illness is not a measure of that child’s value.

Vaccination and Protection From Infection

A vaccine aims to produce protection without requiring the person to go through the full disease. MMR contains live attenuated viruses, not the same exposure as naturally acquired measles, mumps and rubella. The product and the disease need to remain distinct when comparing outcomes.^[2]

Why She Calls for Policy Review

Campbell-McBride argues that modern lifestyles have increased the number of children with compromised immunity and that assessment should precede vaccination decisions. Her proposed survey and three groups are initial policy ideas in the chapter, not results showing that the proposed system performs better than established screening. The assessment article and three-path discussion keep that detail in one place.^[1]

What the Argument Establishes

The book’s position cannot be summarized as either “vaccines never helped” or “seek childhood infections.” Its historical argument opposes abandoning vaccination. A reader could mistake survival after infection for a promise of stronger protection against other diseases. Those are separate questions.

For example, Mina and colleagues studied antibodies before and after measles in 77 unvaccinated children. Measles was followed by losses in preexisting antibody recognition of other pathogens. This finding, often called immune amnesia, does not support a general promise that surviving measles strengthens protection against other diseases.^[3]

A Question About the Language

Does Describing the Argument Mean Recommending Natural Infection?

No. The point here is to explain the author’s reasoning and examine the biological claims separately. Deliberately seeking infection is not a conclusion established by that reasoning. The risk and benefit question concerns a specific disease, vaccine and person.

Your Next Step

Read the GAPS vaccination overview for how this argument fits the chapter. If your question concerns MMR and autism, go to the direct research comparison rather than treating a historical policy argument as a causal study. For a place to organize appointment notes, my Care Team Log is listed in the WFLI Shop.

References

1. Campbell-McBride, N. Gut and Psychology Syndrome, expanded edition (2013; second German edition, 2015), Chapter 8, “Vaccinations: Does MMR Cause Autism?”, clinical observations, proposed assessment and policy argument.
2. CDC. Pink Book, Chapter 20: Rubella, MMR/MMRV formulation and product information, accessed October 17, 2026.
3. Mina, M. J., et al. (2019). Measles Virus Infection Diminishes Preexisting Antibodies That Offer Protection From Other Pathogens. Science, 366, 599–606. doi:10.1126/science.aay6485.