Just two days after retiring the entirety of the US Centers for Disease Control and Prevention’s vaccine advisory panel, US Health and Human Services Secretary Robert F. Kennedy Jr. has appointed several prominent critics of the government’s Covid-19 response to that committee.

Health and Human Services Secretary Robert F. Kennedy Jr.’s moves to upend decades of vaccine policy could hit patients hardest in their wallets, as shifting guidance over shots could make insurance coverage confusing and scattershot.

Public health and infectious disease experts said they were surprised and confused about the move, and questioned why the HHS did not offer any reasoning for its decision.