Source: CDC

Tomorrow: the story of American medical care as seen from the perspective of an inner city Chicago hospital, where most of the patients are uninsured.

[In 2003,] according to the CDC, there was something like 22 percent of American parents of young children were refusing one or more vaccines for their children. Five years later, that percentage had nearly doubled to about 40 percent of all Americans. So the vaccine controversy today is one of the most important public health crises we face in America.

— Historian Michael Willrich on the 100+ year long vaccine controversy.