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​.

An Atlanta shooting that left a police officer dead may have resulted from the shooter’s skepticism about the COVID-19 vaccine, according to reports about the deceased gunman’s and past comments.