Some science positions are so well-supported by data that every literate adult should embrace them. For those who reject facts, an appeal to emotion with funny pictures and clever text can sometimes work to persuade. So, let's celebrate some of our favorite pro-vaccine memes. In the science wars, some positions are so well-supported by mountains of data ("vaccines are safe and effective"), that every literate adult should embrace them. Alas, they do not. For people who reject facts, an appeal to emotion might work. Hence, the meme. It's simply a matter of reality that memes with funny pictures and clever text go viral, while the latest research paper from the Journal of the American Medical Association does not. So, let's celebrate pro-vaccine memes.