SCP-008

SCP-008 is a complex prion that infects the player with a zombie virus, you need a Level 4 Keycard to get in.

It's advised you avoid this SCP as it will infect you and turn you into an SCP-008-1, but if you want to troll you can buy the Playable SCP Pack 1 and play as a SCP-008-1.

Playing as an SCP-008-1 will spawn you in HCZ and automatically put you in Keter mode, you can use this to get a shortcut to HCZ in a Keter run as you won't spawn infected, additionally, playing as a SCP-008-1 instance will allow you to infect other players by touching them, it is highly unlikely though as players are faster than SCP-008-1 substances.

SCP-008 can also be cured with SCP-500, but it is impossible in Euclid or Keter to cure SCP-008 as SCP-500 can only be spawned with Console Commands as of right now. In SCP:CB, entering SCP-008's chamber gives you the Biohazard achievement.