The United States has recorded 2,318 confirmed measles cases so far in 2026, the highest annual total since the disease was declared eliminated in 2000, and this total already surpasses the full-year 2025 count. Most cases are tied to outbreaks, with about 93% linked to outbreaks and thousands of cases arising from dozens of active or newly emerging clusters across states, including Virginia and Pennsylvania. July cases have outpaced 2025's annual total, and age distribution shows roughly half of cases are among ages 5 to 19, with younger children and adults making up the remainder; 93% of cases occurred in people unvaccinated or with unknown status, despite vaccines remaining highly effective. Public health officials warn that vaccination coverage has fallen, including kindergarten MMR rates slipping to about 92.5% in 2024–2025, leaving hundreds of thousands of children unprotected and undermining herd immunity. The situation risks eroding the United States’ measles elimination status, prompting calls for renewed vaccination efforts even as critics highlight political leadership concerns, including Health Secretary Robert F. Kennedy Jr.’s stance and policy choices on vaccine information and funding.