Anthony Fauci on Sunday said Sen. Ron Johnson’s (R-Wis.) comments that the infectious diseases expert “overhyped” the AIDS epidemic and the COVID-19 pandemic are “preposterous,” adding, “I don’t have any clue of what he’s talking about.”

Asked about Johnson’s comments by co-host Jake Tapper on CNN’s “State of the Union,” Fauci said he did not know how to respond to such a remark considering the high death tolls caused by both AIDS and COVID-19.

“How do you respond to something as preposterous as that? Overhyping AIDS? It’s killed over 750,000 Americans and 36 million people worldwide. How do you overhype that? Overhyping COVID? It’s already killed 780,000 Americans and over 5 million people worldwide,” Fauci said.

“So I don’t have any clue of what he’s talking about,” he added.