CDC lists 3 conventional type vaccines (not mRNA) on its website. Why are they not available in U.S.

CDC lists at least 3 conventional type vaccines (inactivated/killed virus as opposed to RNA/DNA) on its own website that are recognized by the United States government as producing immunity to COVID, yet no conventional vaccine is available in the United States. Why

@CDCDirector

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https://twitter.com/RepThomasMassie/status/1472045203506835460