Overview

• CDC data show 1,563 confirmed U.S. cases across 42 states this year, with 44 outbreaks identified in 41 states, the highest annual total in more than three decades.
• South Carolina ordered 21-day quarantines for at least 153 unvaccinated students at two Spartanburg County schools after exposures, as officials reported the state's 11th case and warned of unrecognized community transmission.
• Minnesota’s total rose to 20 after two new cases in unvaccinated children that officials say likely trace to an unvaccinated adult, reflecting broader gaps in routine immunization.
• Utah reports 55 cases and Arizona 63 this year, with Utah wastewater findings indicating wider circulation than confirmed counts and most infections occurring in unvaccinated people.
• Internationally, England has logged 770-plus cases in 2025 and issued winter alerts, while New Zealand’s Northland outbreak reached 12 with two latest cases detected in quarantine.