In honor of school starting all over the country, here’s a thought to ponder:

More and more schools are requiring that kids be vaccinated before they can attend. But have you ever thought they could be “vaccinated” by attending and paying attention?

IMAGE: Man, this was a hard one to track down, even with help from TinEye Reverse Image Search. The original photo seems to have come from Time Magazine in 2008. If I put the clues together correctly, it first appeared on the Logic and Science Tumblr in this form, and was quickly picked up by the I F**king Love Science Facebook Page (at least, according to “The Best Page in the Universe“), though I could not locate it listed there now.