Hillary Clinton has responded to questions about vaccines raised by Senator Rand Paul and Governor Chris Christie with a tweet saying unequivocally that vaccines works. "The science is clear: The earth is round, the sky is blue, and #vaccineswork. Let's protect all our kids. #GrandmothersKnowBest," Clinton tweeted.
But in the 2008 campaign, Clinton herself raised questions about vaccines. “I am committed to make investments to find the causes of autism, including possible environmental causes like vaccines,” Clinton said in the 2008 campaign, suggesting a possible connection between autism and vaccines.