Paul Offit of the Perelman School of Medicine said Robert Malone was “a legitimate scientist” before he started spreading misinformation about the COVID-19 vaccines on social media and in podcast appearances. "He offers you a reason not to get [vaccinated],” Offit said. "It's all wrong. But it's what people want to hear."
https://www.politifact.com/article/2022/jan/06/who-robert-malone-joe-rogans-guest-was-vaccine-sci/ Politifact