California’s top public health officials declared vaccines as “one of the greatest achievements in modern medicine” Friday in the wake of U.S. Health Secretary Robert F. Kennedy Jr.’s comments and ...

Respiratory viruses are usually most active from October through March, health officials say.

California and other Western states reject CDC’s scaled-back vaccine guidance, pledging to follow full immunization schedule for kids.

California and other western states have clarified their recommendations for childhood vaccination schedules in the wake of new guidelines.

California has become the first state in the country to join the World Health Organization's Global Outbreak Alert and ...

Two former senior officials from the Centers for Disease Control and Prevention, including one fired by the Trump administration, will join California as public health consultants, Gov. Gavin Newsom ...

Eighteen states rejected new federal vaccine recommendations as a lawsuit against Health and Human Services Secretary RFK Jr.

At least 245 new cases have been recorded, CDC data shows.