Measles

• As of April 30, 2026, the US reported 1,814 confirmed measles cases, including 12 among international visitors, per CDC data updated May 1. • 93% of cases (1,688) are outbreak-associated, with 25 new outbreaks in 2026 following 24 earlier ones. • This surge underscores ongoing vaccination gaps, contributing to public health challenges amid 2,288 cases in 2025.

• South Carolina health officials ended the nation's largest measles outbreak after six months, with 997 infections and 21 hospitalizations but no deaths. • The outbreak concluded Sunday following over a month without new cases. • This marks a significant public health milestone amid rising national vaccination concerns.

• The largest measles outbreak in the United States in more than 35 years has ended, with no new cases reported in more than 42 days, according to the South Carolina Department of Public Health. • The outbreak began in October 2025 in South Carolina and resulted in nearly 1,000 confirmed cases over six months, with more than 600 cases occurring in 2026 alone; at least 21 hospitalizations were recorded with no reported deaths. • Canada has been significantly impacted, losing its measles elimination status on November 10, 2025, and reporting 907 cases since the start of 2026, with Manitoba accounting for 556 cases.

• Public health officials confirmed two cases of measles in Sacramento County, California, amid ongoing monitoring for potential spread. • The cases highlight persistent risks despite national vaccination efforts, with officials urging unvaccinated residents to seek immunization. • Measles outbreaks underscore gaps in herd immunity, particularly in localized communities, prompting heightened surveillance statewide.

Health secretary says ‘I had nothing to do with the measles outbreak’ and claims to support measles and MMR vaccinesHealth secretary Robert F Kennedy Jr faced intense questioning from several US senators on Wednesday during a hearing largely focused on how the administration has responded to the measles outbreak and the spread of vaccine misinformation.In his opening remarks to the Senate finance committee, the senator Ron Wyden criticized Kennedy’s messaging on vaccines, saying: “When it comes to vaccines, Robert Kennedy has used this once-in-a-lifetime platform to make parents doubt themselves and doubt their doctors,” before adding: “The secretary has ducked, bobbed and weaved without taking the responsibility of saying what needs to be said: vaccines save lives in America.” Continue reading...

Bottlenecks in the system and parent’s suspicions mean doctors expect another serious outbreak soonBy 10am on a spring day, the corridor of the clinic in the Transylvanian town of Săcele was already crowded with parents and children. They were all waiting to see Dr Mirela Csabai, one of just seven general practitioners serving a population of more than 30,000.Most of the cases that morning were routine: colds, checkups, chronic conditions. The calm, however, is recent. In 2024, a measles epidemic tore through this community and left one unvaccinated toddler dead. Continue reading...

• California has recorded at least 40 measles cases so far in 2026, surpassing the 25 cases of all 2025 and the highest annual total since 73 in 2019. • San Francisco confirmed its first measles case in 7 years in an unvaccinated infant under 1 year old, infected during international travel and recovering at home. • Outbreaks linked to unvaccinated travelers from South Carolina's 1,000-case surge and other states, with exposures at Sacramento preschools, San Bernardino, San Diego ER, and Bay Area sites.