Measles cases in the US in 2026 are nearing the total number reported for all of 2025, with six months still left in the year. Reports of measles cases and outbreaks have been noted in several states, including Connecticut, Utah, and South Carolina, where an outbreak has been declared over. The spread of measles may potentially be accelerated by summer travel and other factors, although the overall scope and impact of the current situation are not entirely clear.