As childhood vaccination rates drop, the ABC Data Team has crunched the numbers to see which California counties do not have ...

San Diego County public health officials on Friday confirmed the first case of measles in the region in a teenager who ...

San Diego reports first measles case of 2025 in an unimmunized teen back from abroad. Officials work to trace contacts and ...

It's back-to-school season, and Cook County public health officials are launching a campaign to make sure kids are vaccinated ...

County epidemiology medical director says patient returned home on Aug. 2 from international travel through LAX.