There's no science behind this. It's all someone's whim.
"There is literally no data on how well a single dose of a bivalent mRNA vaccine will protect anyone. But we have known for over 2 years that a single dose of the original vaccines was not good enough."
I think it's because they know the vax is essentially ineffective, even with potential harm outweighing any benefit, but they can't just say not to get it anymore, because just recently they were still urging people to get it. So this is probably a compromise - get the token jab, and we'll pretend all's good.
Beware A.I. snake oil. This is a revealing article and says more about us than A.I. We want A.I. to help us arrive at the best, using criteria of merit. But then we don't like the results it gives us, because of political correctness. "Don't give us the right answer; give us the answer we want to see."
He's trying not to see the Yellow Sign. Is Charles III the King in Yellow? Or at least, the King Surrounded by Yellow. 😬