Kennedy’s visit to Samoa, which later saw a brutal measles outbreak, has become one of the most contentious events in his career.

The health secretary firmly owns this crisis after undermining vaccines over and over again.

Robert F. Kennedy Jr. claimed the U.S. is doing “a better job than any country in the world” at curbing measles.

From the daily newsletter: assessing Kennedy’s war on immunization.

Letters show Kennedy wanted to study Samoa's use of MMR vaccine