Measles Cases

• 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.

Data shows 85% of those infected in the state have been not vaccinated against measles as dozens are hospitalizedMeasles: how does it spread and how can I protect my child?Utah has emerged as a major center of measles infections in the US, as an outbreak that has been building for some time continues to expand.State officials reported a total of 602 measles cases on Wednesday tied to an outbreak that started last year and is still ongoing, including 19 newly identified infections, according to the Center for Infectious Disease Research and Policy (CIDRAP). Recent exposures have been reported at several preschools and elementary schools. Continue reading...

• The US measles case count increased by 43 cases last week to 1,714 total, according to the CDC's weekly update released April 10, 2026. • More than half of the new cases occurred in Utah, marking a smaller jump compared to the prior week's 96-case increase. • This ongoing outbreak highlights gaps in vaccination coverage amid public health concerns over declining immunization rates.

• The CDC reported 43 new measles cases in the US for the week ending April 10, 2026, bringing the national total to 1,714 cases. • More than half of the new cases occurred in Utah, which saw 73 infections last week alone after 142 cases in the past three weeks versus 197 for all of 2025. • The slower increase compared to the prior week's 96 cases highlights ongoing outbreaks concentrated in specific states amid declining vaccination rates.

• Texas health officials reported 156 measles cases as of April 7, 2026, in a Dallas County outbreak starting March 15, with 12 hospitalizations. • 89% of cases unvaccinated, including 45 children under 5; infection rate 90% among exposed susceptibles. • Declared public health emergency; impacts 2 million residents, straining ERs amid 83% vaccination goal miss.

• US measles cases climbed to 1,671 as of April 6, 2026, with 96 new infections reported in the past week, the vast majority in Utah according to the CDC weekly update. • All but 10 cases are linked to 32 states and New York City, with 94% associated with 17 outbreaks including one new outbreak of three or more related cases. • The number of affected states increased by one this week, highlighting ongoing transmission risks amid declining vaccination rates.

• The US measles outbreak has accelerated in 2026 with cases now reported in more than half of the states, marking a resurgence 20 years after official eradication, driven primarily by declining vaccination rates. • Last year, the US reported over 2,000 measles cases (2,213 confirmed) and three pediatric deaths, with the mortality rate matching historical data of approximately one death per 1,000 infected children. • Oregon has diagnosed 13 measles cases so far in 2026 with hundreds of potential exposures in the past week; health experts note that official case counts likely underestimate true infection rates due to unreported cases and undetected transmission indicated by wastewater data.