Robert F. Kennedy Jr.
One health department employee said the directions seemed to be "coercing" subordinates into political activity.
The network's chief data analyst also expanded on the "real worry" of the Cabinet member's actions.
Recent statements stigmatize people who are autistic, they say.
Clinton’s comments came after Trump stood beside Kennedy on Monday to make an announcement linking Tylenol use during pregnancy to autism.
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Sen. Bill Cassidy called on Kennedy's HHS to release any evidence it has on the matter.
Advisers to the Centers for Disease Control and Prevention didn’t specifically recommend vaccination but said people could make individual decisions.
The former New York magazine journalist said she was "honored" to get the role.
"I have many that won't speak about vaccines now and have removed their names off of papers," said former CDC chief medical officer Debra Houry.
Michael Savage said this one Donald Trump move should "never" have happened.