Measles, mumps and whooping cough are things which were treatable with just one shot. But some parents are saying "no" to vaccines.
"Not vaccinating creates much higher risk than vaccinating."
Tom Becker is the parent of a 15-year old son who has autism, so he understands the fears associated with vaccines.
"Kids with autism have a hard time getting rid of the heavy metals in their body. This was one added component to that, so that's why a lot of parents decided this isn't for us."
But, health experts say the bad outweighs the good when parents choose to opt out of vaccines.
"I personally don't believe parents should be afraid of vaccines. I think they should be more afraid if they don't vaccinate their children."
Valerie Rogers is the health coordinator for Springfield Public Schools. She says, with mumps cases popping up in Morgan County, vaccines are vital.
"There are risks that come with a child that's not vaccinated especially when we are seeing an increase in, not necessarily in our community, but in surrounding communities."
In those, the risk can be fatal.
"Some of these diseases actually kill children so we're hoping that parents do get their children vaccinated."
Last year, state lawmakers approved a required meningitis vaccinations for all schools which goes into effect in the fall of 2015. Students who are not vaccinated cannot return to school.
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