Hillary Clinton has a hashtag that we should all heed: #VaccinesWork.
On Monday, the former secretary of state waded into the vaccine debate that's embroiled the country by tweeting a message slamming those, including big-name Republicans and misguided parents, who believe that vaccines are unsafe or linked to conditions like autism.
The message has two parts: First, it comes a day after President Barack Obama issued a blistering warning against people who aren't getting their kids vaccinated, especially after the recent measles outbreak in Disneyland.
"You should get your kids vaccinated," Obama told NBC News. "It's good for them, and the challenge you have is if you have a certain group of kids who don't get vaccinated, and if it grows large enough that a percentage of the population doesn't get vaccinated, and they're the folks who can't get vaccinated, small infants, for example ... they suddenly become much more vulnerable."
He added, "Measles is preventable. The fact is that a major success of our civilization has the ability to prevent diseases that in the past have devastated folks."
Second, the tweet is clearly aimed at Republican presidential hopefuls, like New Jersey Gov. Chris Christie, who have been dispensing dangerous information about vaccinations.
Christie told reporters on Monday that parents "should have a measure of choice" when it comes to requiring vaccinations. Even after clarifying his comments, he failed to take a strong stance in favor of vaccinations, which have proved, time after time, that they're not linked with autism.
Even Republican Sen. Rand Paul (R-Ky.), a doctor, came under fire for saying that vaccinations should be "voluntary" and that it's an "issue of freedom" for parents. Moreover, he backed anti-vaccine propaganda that the shots lead to mental disabilities.
"I have heard of many tragic cases of walking, talking, normal children who wound up with profound mental disorders after vaccines," he told CNBC.
But as likely presidential hopeful Clinton's tweet succinctly says, "the science is clear." Plus, it's hard to argue with #GrandmothersKnowsBest.