You use a Lamouracillin to get rid of the disease. You can buy them in user shops, or you might still be able to turn in 10 candy hearts to create one from Louis.

, :o Omg! It's Relia!

By the way, it was Valentines that you could have got the zombification. And even still, October is more than 6 months ago :P

^ Yeah, I was just thinking that :)