I took the zombie virus during the event this year but soon after stopped playing. Because of this I don't really know how to cure it. Can anyone help?

At the beta wardrobe you can change your avatar base back to normal (at 'skins' - none), you don't need to take a cure.

Ohh thank you for help!!

You're welcome ^^ I see that you have already changed it. Just in case you didn't notice: you can change back to the zombie skin if you want, just look at the skins option and you'll find it there.