How common are vaccine and milk myths?

Survey finds two-thirds believe unproven health claims

A new survey reports that more than two-thirds of people believe at least one false or unproven health claim. The claims cited include misconceptions about vaccines and pregnancy medications, along with alternative-health ideas such as raw milk.

Among the examples described are beliefs that taking paracetamol during pregnancy causes autism—an assertion that is widely rejected by established medical evidence. The survey also points to broader confusion about what health claims are supported by data versus what is circulated online or through personal anecdotes.

The results matter because belief in incorrect health information can directly affect decisions about prevention and treatment—especially for vaccines, maternal health, and infectious disease control. When misinformation spreads, it can increase hesitancy, delay care, or encourage unsafe practices.

For public health officials and clinicians, the finding underscores the continuing need for communication strategies that are easy to understand and tailored to real-world beliefs. For consumers, it highlights the importance of checking whether a claim is supported by credible evidence, such as outcomes from large studies or official guidance from health authorities.

If misinformation about vaccines and common exposures is already entrenched, health systems may face added pressure during outbreak seasons. At the same time, reducing uncertainty—for example, by clearly explaining what the best available research shows—may be one of the most practical ways to close the gap between what people believe and what is supported by evidence.