My Little Parasite

In the Mlp universe, but a virus spreader now whoever gets exposed to this virus that has a cut or gets bitten, or touched turns into "one of them"...nobody knows what its called? (make your own oc, or any taken character because the main 6)..Twilight is fully infected, and she killed spike, Fluttershy shes alive just injured and hideing, Rainbowdash is alive she recovered from a injury, Applejack is looking after and she is taking care of Rainbowdash,Rarity got her eyes ripped out and almost died to death because of Pinkie pie but she wasn't exposed somehow. PinkiePie is fully infected she almost killed Rarity and her and twilight are the most infected and dangerous