Dr. Jay Bhattacharya, director of the National Institutes of Health, said he trusts the science on childhood vaccines as the United States faces its worst measles outbreak in 35 years. In an interview on CBS's "Face the Nation with Margaret Brennan," Bhattacharya expressed confidence in vaccine science. His comments come after Health and Human Services Secretary Robert F. Kennedy Jr. earlier made remarks about childhood vaccines, though Kennedy has since advised parents to vaccinate their children against measles amid the growing outbreak. The measles outbreak has surged to levels not seen in more than three decades, prompting federal health officials to urge vaccination.