Stanford's Dr. Keith Van Haren says about 20 cases have been identified in California in the past year and a half and they're the only ones in the U.S.
Van Haren says the five cases he studied had been vaccinated against polio. He plans to talk to the media about the illness Monday evening from Lucille Packard Children's Hospital at Stanford.
Dr. Jane Seward of the Centers for Disease Control and Prevention cautions that the research is still underway in California, and there are a variety of infectious diseases that can cause childhood paralysis.
State officials have chosen University of California health care systems as go-to facilities to treat California-based patients diagnosed with the Ebola virus.
Sacramento County says it has begun monitoring people in the area who have recently arrived from three West African countries affected by Ebola. Officials say very few people belong in that category.
By the beginning of next year, the Washoe County School District will provide low-income families with health care for the first time.
Fast food workers in Sacramento and dozens of other American cities are expected to walk off the job Thursday in support of higher pay and a right to unionize.
A bill that would require health insurers in California to provide free coverage of all FDA-approved birth control methods has passed the Assembly on a party-line vote.