“This appointment is an affront to the principles of public health, the tireless dedication of medical professionals, and the trust that millions of Americans place in the health care system,” the letter reads.
The letter was published online Thursday by the Committee to Protect Health Care.
“RFK Jr. Has a well-documented history of spreading dangerous disinformation on vaccines and public health interventions, leaving vulnerable communities unprotected and placing millions of lives at risk.
The letter is part of a broader campaign effort from the Committee to Protect Health Care to encourage health care workers to try to stop Kennedy’s confirmation as HHS secretary.
Doctors and other health care workers are encouraged to contact senators, email the American Medical Association and other professional groups as part of the campaign.

More than 15,000 doctors urge Senate to reject RFK Jr. as Health secretary