Great example of how correlation does not imply causation. It is sad that most people do not understand science. Ask your students to propose other reasons for the data such as poverty or access to health care. Better yet, have them come up with other positive correlations such as number of supermarkets or number of television sets.
The following is a statement made by the executive producer of the controversial documentary Vaxxed... http://www.march-against-monsanto.com/vaxxed-a-statement-from-the-producer-of-controversial-film-exposing-cdc-corruption-mmrautism-link/