California's measles outbreaks persist in pockets of unvaccinated communities

California is fighting multiple measles outbreaks concentrated in pockets of unvaccinated communities, with seven counties reporting 21 cases this year. Containment requires rapid case investigation and contact tracing, and costs have run into the hundreds of thousands per cluster. Many cases are travel-related, and local health departments face funding cuts that strain vaccination programs and public health infrastructure. Officials emphasize vaccination to protect communities as outbreaks persist nationwide.