The Sims: Deluxe Edition Tips

Guinea Pig Cure, without cheats
If one of your Sims is infected by the dirty guinea pig bite, they don't have to die, or you don't have to delete them by move_objects on.

You can first isolate that Sim from their family by creating a different compartment that is not connected to the house. Make sure the room has everything the sim needs to survive, e.g toilet, bed, shower, fridge. Let your sim go in there, and then delete the door. Make sure they constantly wash their hands and take showers. When no one is home, you can buy a door and let that sim into the house. They can use everything, but make sure they clean it right after and make sure they are back into the compartment without a door when the other sims are home. Continue doing this, and your sim will be cured.