I think Rochelle Walensky deserves most of the blame for this. Back in April she was saying that the vaccines prevent infection and transmission and that you won't get COVID if you get vaccinated. I'm trying to figure out how an idiot like her ends up at the head of the CDC, or teaching at Harvard, for that matter.
Harvard and most elite institutions are fighting a war on competency, so I guess it's not so surprising that she slipped through the cracks there. But I suspect she's skilled in other areas that enabled her to succeed in a man's world. To put a finer point on it, I suspect she suck-started her career and sucked her way to the top like Kamala Harris.