Ben Carson and Rand Paul have faced criticism from medical experts for comments they made at the CNN GOP debate this week. The two candidates seemed to validate the push to space out when vaccines are administered to children to prevent autism.

During the debate, Carson dismissed the link between autism and vaccines. But, he affirmed the decision to have less of them so close together.

The retired neurosurgeon said at Wednesday's Republican presidential debate that it's true that they have been probably giving way too many in quite short period of time. He said, "And a lot of pediatricians now recognize that and I think are cutting down on the numbers and the proximity in which those are done and I think that's appropriate".

In a CNN op-ed, a brain injury specialist at the Shepherd Center in Atlanta Ford Vox wrote that the schedule was created for a reason.

He mentioned that all the 12 vaccines administered to children target common causes of crippling and deadly childhood diseases. He said that the vaccines represent the fruition of scientists and clinicians many-year long hard-won medical study and careful analysis.

He criticized an ophthalmologist, Rand Paul for saying that it was okay to spread out the vaccine schedule. Paul told the debate audience that he doesn't trust the recommended schedule.

Both Carson and Paul were criticized by Vox for pandering to the wings of their party that are quite likely to reject vaccines.