Health officials in California are sounding the alarm as measles cases continue to climb. The state now reports 17 confirmed cases, including an outbreak in Shasta County tied entirely to unvaccinated or unknown-status patients. Two infectious cases also visited Disneyland, raising concerns about wider exposure. Doctors are being told to watch closely for symptoms like fever and rash. State health leaders say making sure families are up to date on the MMR vaccine is key to stopping the spread.