Robert F. Kennedy Jr. told senators he would apologize if data shows vaccines don’t cause autism, but he cited a poorly conducted study to counter the dozens that show they do not.

Kennedy Jr. is revising his ethics agreement to divest his interest in litigation against an HPV vaccine maker and directing the stake to his adult son, The New York Times reported Friday, citing a written response to questions from senators who are weighing his confirmation as Health and Human Services secretary.

Facing intense scrutiny from senators over his potential profit from vaccine lawsuits while serving as the nation's health secretary, Robert F. Kennedy Jr. said that if he is confirmed he will not collect fees from litigation against the drugmakers of a cervical cancer vaccine.