i think i got swine flu in australia during the epidemic here. it was described as simply being a mild flu usually (unless it was severe), our govt health department said if you have the flu its probably swine. I was fine, it was a mild flu. never got it diagnosed though so cant be sure of course.

edit: and re. vaccines, from what i can tell the flu only has to change a bit (which it tends to do) and the vaccine is useless.