Recently, I published a study with Ted Tomeny at the University of Alabama where we looked at how vaccine talk on Twitter (specifically the myth that vaccines cause autism) changed over time. Here’s an animated map that shows how that talk changed across time. The darker the shade, the stronger anti-vax sentiment expressed in that area.
Read the article here, or check out the map with overall area averages (across 5 years) here. Having issues with the map, try the fullscreen animated version here.