Between December 1, 2023, and January 23, 2024, the United States Centers for Disease Control and Prevention (CDC) recorded 23 confirmed cases of measles, with seven linked to international travel and two outbreaks exceeding five cases each. Unvaccinated children and adolescents were most affected. CDC is advising pharmacists and other health care providers to be vigilant for patients with febrile rash illness who recently traveled abroad, especially to countries with measles outbreaks. Measles patients are contagious four days before and four days after the onset of their rash. A heightened global measles threat underscores the importance of these measures. Additional information for health care providers is available on the CDC website.