State health director Will Humble is asking his staff to study new data on declining vaccination rates and to provide him with "intervention recommendations."
"More AZ parents are choosing not to vaccinate their kids- and using “personal exemptions” when they enroll their kids in school," Humble wrote in a blog over the weekend.
"If the trend continues, we could jeopardize our immunization rates enough so that we’d see long gone diseases like measles and mumps return in AZ."
Humble has asked his staff to study hard data on personal exemptions provided by researchers at the University of Arizona's Mel and Enid Zuckerman College of public health.
The state's immunization website includes the findings and recommendations from the UA study.
The Arizona Daily Star did a special report on parents who don't vaccinate their children in 2012. To read it click here.