Influenza question

[NutzyClutz]

Every year they come out with new flu vaccine, because the old virus adapted to old one?

Could we predict what the virus would adapt to, and make the vaccine for both the original and mutated version. This double whammy stopping the chain?

Or could we have vaccine mutate the virus in a circular pattern?, so virus a, treated mutates to b, and virus b, treated, mutates to a. then we can just give vaccine a&b and stop the chain.