It is the panel's first meeting with Kennedy's newly appointed members, many of whom are well-known vaccine critics.

The Trump era is rife with Republicans who abandon their principles in the name of toeing Donald Trump’s line. But few have gambled with those principles recently like Louisiana Republican Sen. Bill Cassidy.

A panel of key government advisers appointed by Health and Human Services Secretary Robert F. Kennedy Jr. will weigh in on an infrequently used vaccine preservative that has been wrongly linked to autism in the past.