How Health Misinformation Spreads

Health misinformation is not new — patent medicines promising miraculous cures have been peddled since antiquity. But the digital age has created conditions for the spread of health misinformation at unprecedented speed and scale. During the COVID-19 pandemic, the World Health Organization declared an "infodemic" — an overabundance of information, including misinformation, that makes it harder to find trustworthy guidance when it is most needed. Understanding the mechanisms by which health misinformation spreads — and why it is so difficult to counter — is the first step toward inoculating yourself and your community against it.

Why Health Misinformation Is Particularly Sticky

Misinformation that exploits health topics has several features that make it especially persistent:

Emotional resonance: Health threats are existential — they activate fear, love, and protectiveness that override rational evaluation. A parent terrified about a child's safety will find vaccine misinformation viscerally compelling in a way that a calm explanation of population-level statistics cannot easily counter.