NEW YORK (AP) - Health officials say measles is up — again — in the United States, and they're investigating a new cluster of suspected cases in Ohio.
The nation has seen more cases of the highly contagious disease so far this year than at the same point of any year since 1996.
Authorities say 129 cases in 13 states were reported by mid-April. Most were in California and New York City. Most were triggered by travelers who caught the virus abroad and spread it in the United States among unvaccinated people.
The national tally already may be outdated. Ohio officials on Thursday announced a new cluster of 13 suspected cases in rural Knox County. At least three recently traveled to the Philippines, where a recent measles epidemic has caused 20,000 illnesses.