“The [measles] vaccine wanes about 4.5% per year. So that means older people are essentially unvaccinated. They aren’t — their immune system is not protected.”

Sources and attribution

1. [S1] FactCheck.org original review

   Original review · Retrieved October 16, 2026

Original review: FactCheck.org. Structured data compiled by Data Commons under CC BY 4.0. Publisher article content is subject to its own terms.

Updated October 16, 2026