Wednesday 11 November 2026

Society Explainer

Why are US measles cases at their highest since 1991?

The United States has logged 5,182 measles cases this year, more than double 2025. The number tells us less about one virus than about a community rate that no single family sets, and the ethics fight over exemptions turns on that point.

By the Society desk 4 min read
Vintage US public-health poster showing the map of the United States crossed out with the word Measles and the message Keep Measles a Memory, Immunize
Archive poster, US Department of Health and Human Services / CDC, via National Library of Medicine (Flickr Commons, no known copyright restrictions)

Produced by the PhiloCrux newsroom with AI-assisted research and drafting; every claim is checked against the sources linked and a person is accountable for what we publish. How we work.

Filed under Society

More from Society