Via the California Department of Public Health: Measles Cases on the Rise in California. Excerpt:
The California Department of Public Health (CDPH) has received reports of 32 confirmed measles cases in California residents so far this year. Cases have occurred throughout California. This time last year, only three measles cases had been reported.
“Immunization is the best defense against measles, with 99 percent of persons developing immunity after two doses,” says Dr. Ron Chapman, state health officer and director of CDPH. “With an outbreak in the Philippines and measles transmission ongoing in many parts of the world outside of North and South America, we can expect to see more imported cases of this vaccine-preventable disease.”
Imported cases can spread to the community, especially among unvaccinated persons, including infants too young to be vaccinated.
The 32 measles cases have been reported in Alameda (1), Contra Costa (4), Los Angeles (10), Orange (6), Riverside (5), San Mateo (1), San Diego (4) and Santa Clara (1) counties.
High immunization rates in California have kept preventable childhood diseases, such as measles, at record lows during the past 20 years. Since 2000, when measles was declared eliminated in the United States, the number of cases per year in California has ranged from 4-40 cases.
In that time, almost all measles cases in the United States have been linked to travel to areas of the world where measles still circulates. Among the California cases with onset in 2014, seven had traveled to the Philippines, where a large outbreak is occurring, two had traveled to India and one had traveled to Vietnam, where measles is endemic.