I did a quick search, but didn't find out much info on it. I had a level 10 witch cast it on someone, than I basically forgot about it and went on with his life. A few weeks later, he went to the consignment store and all the specialists were coughing and gagging which I thought was hilarious. Weird thing is I tried to save him in edit town so I could have a level 10 witch whenever I wanted, but it wouldn't let me save him. I thought it was because of the curse on everyone, so I did another level 10 witch, but I saved him before I did the curse. After the curse spread, I saved him and it worked fine, so I guess my question is what exactly, besides making sims sick, does the pestilence curse do?