(KFYI News) Lately, more parents are not immunizing their children, according to Dr. Rebecca Sunenshine with Maricopa County. 

She says even if one child is not vaccinated, classmates and friends can be affected. 

Parents can become complacent because a disease hasn't been around for a while, but diseases that caused death before the vaccine, could reappear if enough children are not vaccinated.

For more information, go to www.whyimmunize.com