There was a notable absence last week when Robert F. Kennedy Jr. announced that the government would no longer endorse the COVID-19 vaccine for healthy children or pregnant women.

A medical officer at the US Centers for Disease Control and Prevention who was working on the committee that was weighing changes to the agency’s Covid-19 vaccine recommendations resigned on Friday, the same day officials the US Department of Health and Human Services announced they had removed the CDC recommendation for pregnant women and healthy children to get Covid-19 vaccines.