RFK Jr. is urging parents to vaccinate children against measles as U.S. cases reach levels not seen in decades. Multiple outlets report that the United States is experiencing its worst year for measles in more than 30 years, with cases hitting a 35-year high. The comments come from RFK Jr., who has previously been critical of vaccines, but who now advises families to ensure children are vaccinated to help prevent measles infections. The reports frame the guidance as a response to the scale of the outbreak and the public health risk posed by sustained transmission. The emphasis across sources is on the severity of the current outbreak in the U.S. and on vaccination as a protective measure for children. Both articles characterize the situation as a major escalation in measles activity compared with recent years.