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.
In 22 Northern California counties, some health insurance customers have only one choice of insurer in Covered California. We go to a rural community north of Quincy to find out what that's like.
Blue Shield of California stopped selling policies to individuals in 250 zip codes in 2014. The coverage area reduction is especially felt in Northern California, where consumers have few choices through Covered California.
Anthem Blue Cross, the largest insurer in Covered California's Northern California region, ended an out-of-state benefit for individual planholders this year. Blue Shield of California plans in the region also restrict care to within state lines.
The open enrollment period for Covered California began less than a month ago. But the pace of applications and enrollments has already exceeded last year.
California offers several services for both documented and undocumented immigrants. But fears about deportation deter many people from taking advantage of the benefits offered to them.