US anti-vaccine movement stands firm despite measles outbreak With a growing number of measles cases being diagnosed across the United States, there’s an increasing push to make vaccines mandatory in the United States. In the state of Colorado— which, according to the CDC, has the lowest rate of vaccinated school-age children in the U.S.—vaccines are now at the center of a heated debate, pitting public health concerns against parents’ rights. A natural sound version of an AFPTV report.