Flu for birds.
Various forms such as H5N1. It isn't as bad as the Americans make it out to be, just don't have sex with birds.
It is lethal to humans. Very difficult to make a vaccine because we made vaccines from eggs, and eggs come from birds thus preventing us from making an effective vaccine.
Methods of prevention:
1)Wear a condom while fucking birds
2)DON'T GO OFF FUCKING BIRDS IN THE FIRST PLACE!, that is how we got A.I.D.S.
3)Don't get raped by a bird.