Ok if Zombies (Romero type) really attacked...

[UltraMarioMan]

To clairify I mean everyone who dies ANYWHERE as long as the brain is intact rising. An airbourne virus that has no effect on the living could spread throughout the major world powers in a few days. By the time they relised there was an illness it would be to late to stop it. Only once the dead started rising in a large noticeable number would it be detected. One or two dead rising would not be enough. That would go ignored as a prank or something.