Robert F. Kennedy Jr. traveled to a Steak ‘n Shake in Florida this weekend for an interview with Fox News’ Sean Hannity to endorse the fast-food franchise’s new fries. It’s the type of recommendation that doctors and pediatricians have implored the new health secretary to make about vaccines. But many of his public statements and interviews have, instead, raised doubts about immunizations. Kennedy’s first month in office has been dominated with high-profile resignations, a measles outbreak and — supporters point out — successes with reshaping Americans’ diets by pressuring fast-food chains like Steak ‘n Shake to cook with beef tallow, instead of cooking oils. Robert F. Kennedy Jr. traveled to a Steak ‘n Shake in Florida this weekend for an interview with Fox News’ Sean Hannity to endorse the fast-food franchise’s new fries. It’s the type of recommendation that doctors and pediatricians have implored the new health secretary to make about vaccines. But many of his public statements and interviews have, instead, raised doubts about immunizations. Kennedy’s first month in office has been dominated with high-profile resignations, a measles outbreak and — supporters point out — successes with reshaping Americans’ diets by pressuring fast-food chains like Steak ‘n Shake to cook with beef tallow, instead of cooking oils. AP Technology and Science