Topline:
A Riverside County resident has tested positive for measles, the first case in that county in seven years .
Why it matters: Measles is a highly contagious and dangerous disease; three out of 1,000 people infected can die. It is hard to predict who will get seriously ill.
Why now: This is the ninth recent measles case in California, with others reported in Fresno, Los Angeles, Orange, Placer, San Mateo and Tuolumne counties. Measles cases are on a sharp rise this year nationwide.
The backstory: The resident of the eastern part of Riverside County had recently traveled abroad and is recovering at home. It’s unclear if the resident was vaccinated against measles. More than 96% of Californians are estimated to be vaccinated against measles, according to the CDC…