As the death toll from the worst measles outbreak in decades rises, Robert F Kennedy Jr headlined the Washington DC conference of the anti-vaccine organization Children’s Health Defense, which he led for nearly a decade.

“Let me be clear. You have a strong and steadfast friend at the White House,” Kennedy, now serving as secretary of the US Department of Health and Human Services (HHS), told anti-vaccine activists at the conference in a nearly hour-and-a-half-long speech. He urged patience, saying that he would’ve made sweeping changes “on day one” but that he had to follow the law in order to make permanent change.