Kennedy has been a leading voice in spreading false information about vaccines, scientists and public health leaders, often using heated rhetoric that says they have caused mass death and injury. People he describes in such language have said his comments have led to threats, intimidation and even violence.

Four CDC workers, who were not authorized to speak publicly, told CBS News under the condition of anonymity that they were "deeply disappointed and frustrated" by an apparent lack of leadership following Friday's shooting​.

The manager of the CVS across the street from the Centers for Disease Control and Prevention's main campus in Atlanta recounts the terrifying moments she and her coworkers decide to "run, fight, hide" during an active shooter situation.