They make the polio virus by infecting monkey tissue. Then they separate that, they sterilize it, purify it, mix thimerosal, which is liquid mercury, formaldehyde and aluminum with it.
Those are just three of the nasty contaminants and they put that in there and they inject it in you.
So yes, you can get a flu, but it has to be injected in you. That's the only way you can get a foreign flu.