The CNN anchor revealed his multiple sclerosis diagnosis after Fox News’ Tucker Carlson spread vaccine misinformation in light of Colin Powell’s death but Carlson failed to mention Powell was being treated for blood cancer when he died, reducing his body's ability to fight infection.

"I'm going to share a secret I've never shared before: I'm immunocompromised," John King said in a segment on COVID vaccine misinformation.

“That’s a ‘D’ or an ‘F’ if this were a spelling or grammar quiz,” King said.