Generate an explanation for the given claim using the provided supporting material from the paragraph. Please consider the following points while generating an output. 1) The claim will always have supporting proof in the paragraph, and the paragraph will have a clear point of view supporting the claim. 2) There can be instances where direct correlation to the claim is not available. Make use of the sentences in the paragraph to provide a corresponding output supporting the claim. 3) The explanation should be at least one and at most twelve sentences long.

Paragraph: The group stood in the rain outside the state Capitol Tuesday urging lawmakers to protect a state law that permits people not to vaccinate their children for religious reasons. They say that parents are best suited to make medical decisions for their children even if the vaccines are recommended by public health experts. Some lawmakers have proposed eliminating the religious exemption amid an ongoing measles outbreak. Most of the cases seen in New York are among unvaccinated people in Orthodox Jewish communities. Measles was once common in the U.S. but gradually became rare after vaccination campaigns that started in the 1960s. Claim: Parents rally at state Capitol to keep vaccine exemptions.
Hundreds of parents and vaccine skeptics have called on New York lawmakers not to narrow existing exemptions to the state childhood immunization rules.