HealthDay (6/13, Norton) reports that while the majority of US kids “are getting their routine vaccinations, recent trends have experts concerned that Americans will lose some of the ‘herd immunity’ that has long protected many from serious infections.” Most US children “are up-to-date with routine jabs against once-common infections like polio, measles, mumps, whooping cough and chickenpox.” However, “that ‘coverage’ varies from state to state, according to the latest figures from the” CDC.