Mass measles outbreak threatens Central Valley after farmworkers left Arizona

Fresno, Madera and Merced counties said the workers were exposed to the highly contagious viral infection because there was a major outbreak in the part of Arizona they're coming from.

Mass measles outbreak threatens Central Valley after farmworkers left Arizona
Fresno, Madera and Merced counties said the workers were exposed to the highly contagious viral infection because there was a major outbreak in the part of Arizona they're coming from.