Humans VS Zombies

Yes, this university is as cool as to be able to pull off a campus-wide game just like that, involving every single person in the uni regardless they play or not.
This game was first done in the USA I think, but was quicly imported with slight modifications. First and most important, it was not compulsory to stay overnight in campus (however, how epic would that have been).
But lets start from the beginning and explain the rules!.
Humans wear orange bandanas and zombies purple ones, the first day everyone is human but one original zombie that can disguise as a human for the first 14 hours of gameplay.
Humans can stun zombies for 15 minutes shooting them with a Nerf gun, and zombies can convert humans into zombies touching them (as in tagging them).
Zombies die if they do not feed within two days
Humans have to complete 4 out of 5 missions given one each day.
All campus is the playground, except indoors and inner courtyards.

This is the game setting. Of course I am in, and was very excited the first 5 hours. And then I got tagged by a zombi because I was to distracted with some stupid conversation to notice he was right behind me. Now, at the beggining of day 2, there is a 90% population of zombies and we are all starving. I have only seen 3 humans today, all of them indoors... This is going to end pretty soon XD