Measles is climbing — travel alert
Measles cases in the U.S. have risen again, so anyone planning spring travel should check vaccination status and local alerts. The CDC-tracking numbers showed a 6.1% week-over-week increase as of April 3, and reporting recalled that U.S. measles tallies topped about 1,900 cases in 2025 with 49 outbreaks and recent surges in South Carolina, Utah, Arizona and Connecticut ( | ). States are already responding — Oregon logged 13 confirmed cases in the first three months of 2026, Walla Walla County reported its first 2026 travel-linked case in an unvaccinated resident, and Michigan urged early vaccine doses after seven cases in Washtenaw County and an eighth in Ingham County ( | | ).
The spring travel warning is not about one runaway outbreak in one place. It is about a virus moving through the gaps between places: a traveler brings measles home, an unvaccinated pocket of people gives it room to spread, and public health departments start posting exposure notices for grocery stores, emergency rooms, and restaurants. As of April 2, the CDC had counted 1,671 confirmed U.S. measles cases in 2026, up 96 from the week before, a 6.1% increase. Almost all of those cases were tied to outbreaks. (cdc.gov) (contagionlive.com) That pace matters because 2025 was already a bad year. The CDC’s final tally for last year was 2,286 confirmed cases and 48 outbreaks, with 90% of cases linked to outbreaks. Measles was declared eliminated in the United States in 2000, which meant the virus was no longer spreading continuously here for more than 12 months. Elimination did not mean eradication. It meant the country had pushed measles to the edge, where imported cases could still light fires if vaccination slipped. (cdc.gov 1) (cdc.gov 2) Now those sparks are landing often enough that states are changing advice before summer even begins. Oregon reported 13 confirmed cases in the first three months of 2026, compared with just one case in all of 2025. Oregon health officials and local counties have posted repeated public exposure alerts in the Portland area, and local reporting says the state is already seeing enough activity to worry about a much larger outbreak in under-vaccinated communities. (opb.org) (kgw.com) (multco.us) In southeast Washington, Walla Walla County reported its first measles case of 2026 in an unvaccinated resident who was exposed during international travel. Officials said the person spent time in the county while contagious, which is the detail that turns one diagnosis into a community problem. Measles spreads through the air, and the virus can linger after an infected person leaves. (dch.wwcowa.gov) (nbcrightnow.com) (cdc.gov) Michigan has gone a step further and started adjusting vaccine timing. On April 2, the state health department recommended an early MMR dose for infants 6 to 11 months old who live in or travel to seven counties around Washtenaw and Monroe, where officials are worried about ongoing community transmission. That is not the routine schedule. It is a response to a local risk that has grown large enough to justify moving protection forward. (michigan.gov) (mlive.com) For travelers, the mechanics are simple. Measles is one of the most contagious human viruses. Two doses of MMR are about 97% effective at preventing it, and the CDC specifically advises people to talk with a healthcare provider about vaccination before travel. The practical question is no longer whether measles exists somewhere else. It is whether your airport, your destination, or your child’s waiting room has become one of the places where it briefly hangs in the air after someone coughs and walks on. (cdc.gov)
