The sharp rise in cases comes amid a decadeslong decline in childhood vaccination rates.

Measles cases in the United States have just passed a "grim milestone", reaching numbers that haven't been seen in 35 years.

The United States has recorded more measles cases this year than in any year since 1991, with more than five months still left on the calendar.

Measles vaccines helped the U.S. eliminate measles 26 years ago

2026 has become the worst year for measles since 1991