Originally Posted by 2StgTurbine

From what I've read, each production facility is highly specialized. Modifying one facility to make a different vaccine takes time and that can't be done until they actually create a working vaccine. And then it still comes down to who will pay for this. Private companies aren't going to take a huge financial risk by stopping production of their current vaccine (which would involve breaking contracts) in order to start producing a vaccine that is still being tested.