Overview

• The CDC reports 1,088 measles cases in 32 states so far this year, marking the first time the U.S. has exceeded 1,000 cases since 2019.
• Approximately 96% of confirmed infections are in people who are unvaccinated or whose vaccination status is unknown.
• Johns Hopkins data reveal that 78% of U.S. counties saw county-level MMR rates drop from a pre-pandemic average of 93.92% to 91.26% post-pandemic.
• Only California, Connecticut, Maine and New York reported increases in county-level MMR vaccination rates between 2019 and 2024.
• Three measles-related deaths have occurred this year, all in unvaccinated patients, and the CDC maintains that two doses of the MMR vaccine are up to 97% effective.