thewashingtonpost: Medical experts reacted with alarm Monday as two top contenders for the Republican presidential nomination appeared to question whether child vaccinations should be mandatory — injecting politics into an emotional issue that has taken on new resonance with a recent outbreak of measles in the United States.

First, New Jersey Gov. Chris Christie, while visiting a vaccine laboratory here, called for “some measure of choice” on whether shots guarding against measles and other diseases should be required for children.

Then, Sen. Rand Paul (R-Ky.), an ophthalmologist who is also readying a 2016 campaign, said in two U.S. television interviews that he thinks most vaccines should be voluntary, citing “many tragic cases of walking, talking, normal children who wound up with profound mental disorders after vaccines.”

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