Zombie Apocalypse or Nuclear Apocalypse?

Which would you prefer? It might help to clarify whether the zombie apocalypse is based on an airborne virus or transmitted through contact. For argument's sake, let's say it was through contact. I think that makes the case pretty clear for the zombie apocalypse. With nuclear, there are issues with radiation and the world being messed up as a result. For the zombie apocalypse, watch "I am Legend" or "28 Days Later" and you get an idea of what things might be like. I planned to make a better case for it, but I'd hope for the zombies