Alexander and his Trump administration allies bickered with other officials over his push for a completely different strategy, involving so-called herd immunity. Alexander's preferred plan was to keep

things open, let low-risk people get infected, try isolating high-risk people, and in cases of serious illness, prescribe cocktails of existing anti-viral drugs.

Alexander made clear that he supports other vaccines: "I am not an anti-vaxxer. I am for vaccines. My kids are vaccinated. … It's [just] these vaccines," he said.