Imagining there is form form or rabies or something, the symptoms of which make people behave like zombies, then this is my answer:
It depends on where it starts. if it starts somewhere poor and remote, like some African village or something, then it would take longer for it to spread, but it would probably have very little in the way of interruption due to the news not getting out quickly and resources to form a military quarantine being low,and the disease could spread around, but then again, travelling for the zombies would be damn near impossible, and if it did get out of hand then the borders of that place could be closed anyway.
But if it starts in a 1st world, highly populated area, then - although it would spread quickly - a quarantine is very likely, and the military could just bring in helicopters and tanks, even just very light armoured vehicles to deal with the problem in a way which renders zombies completey useless. have you tried chewing through a tank? I imagine it to kind of be like Shaun Of The Dead, when the army just turns up and wins. In games/films/TV shows when you see abandoned tanks in the middle of the road, I just think, "no, how did that tank crew even die?"
Sooooo... no.