Trump and Kennedy asserted without evidence a link between vaccines and autism.
California health departments are fighting to contain measles outbreaks as cases rise and resources shrink. Investigating communicable diseases is time-intensive and expensive. Officials say teams have about 72 hours after a positive case to find exposed people and stop spread.
More than a dozen states sued the Trump administration over its rollback of vaccine recommendations for children, calling the move an illegal threat to public health.
Triple-negative breast cancer is considered the deadliest form of this disease.
The Los Angeles County Department of Public Health said the three measles cases reported in the past week are not related. All three patients recently traveled internationally.
The American Academy of Pediatrics on Monday released its updated recommendations for what vaccines children should get.