Public health officials and community leaders say that even before federal immigration authorities launched a crackdown in Minneapolis, a crisis was brewing.
Measles vaccination rates among the state's large Somali community had plummeted, with the myth that the shot causes autism spreading. Not even four measles outbreaks since 2011 made a dent in the trend. But recently, immunization advocates noted small victories, including mobile clinics and a vaccine confidence task force.
