[AFB-XYZ]

I’d kind of still like to know how the CDC has the authority to direct whether cruise lines operate or not.

Isn’t that the provenance of Dept. of Transportation or some other federal dept.?

[conservatism_IS_compassion]

Well, the UK has approved a vaccine, and I’m wondering how long the CDC can hold out before doing the same.

. . . and I would suggest that a ship of vaccinated passengers should be just fine, thank you. And the cruise lines logically might start suing the CDC.

Maybe the cruises will start originating out of country somewhere . . .

[semimojo]

I’d kind of still like to know how the CDC has the authority to direct whether cruise lines operate or not.

They don't, but once a Public Health Emergency has been declared they can keep them from entering US ports.