They also have no ability to dictate US actions or enforce a single one of their regulations in the US.
The WHO can declare all the emergencies they like - US statues and our constitution determine what actions our government(s) take.
We're not giving up our sovereignty.
A genuine bona-fide treaty has to be ratified by the Senate in order to be valid.
I don’t know off hand if it’s simple majority or 2/3 vote to ratify.
If it’s not ratified it’s meaningless.