Whooping cough, measles, mumps, and chicken pox are staging a comeback thanks to falling vaccination rates.

This map documents vaccine-preventable disease outbreaks in the US lower 48 from 2008 to 2015. Knowing which states are most heavily affected by these epidemics is essential for mobilizing resources to prevent future outbreaks.

Toggle the sequencer buttons at bottom left to see outbreaks for a single disease. Note that each circle represents data for an entire state, not a specific location.