More than 750 current and former staffers at the US Department of Health and Human Services implored Secretary Robert F. Kennedy, Jr. in a letter Wednesday to “stop spreading inaccurate health information” after a shooter fired hundreds of rounds at the headquarters of the US Centers for Disease Control and Prevention earlier this month.

Kennedy accused the American Academy of Pediatrics of working for Big Pharma, even as he himself has profited from attacking vaccines.

Kennedy Jr. with what he described as “the question that everybody is wondering about” on Tuesday. Namely, “Why do you wear jeans when you work out?” “Well, I just started doing that a long time ago because I would go hiking in the morning and then I’d go straight to the gym and I found it was convenient and now I’m used to it so I just do it.