The science is clear: The earth is round, the sky is blue, and #vaccineswork. Let’s protect all our kids. #GrandmothersKnowBest

Former Secretary of State and Senator Hillary Clinton, weighing in on Twitter about the anti-vaccination movement, which is responsible for recent measles outbreaks. Clinton, who wasn’t as plain-spoken about her support for same-sex marriage during an appearance on NPR’s Fresh Air, seemed to be reacting to statements from Gov. Chris Christie (R-NJ) and Sen. Rand Paul (R-Ky) expressing support for parents who choose not to vaccinate. Both are potential 2016 presidential candidates, as is Clinton.

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