"You desired to take from those you didn't know and this wish I shall grant." Genie said as she walked around the naked floating man. "First I'll cure the diseases I gave you." And with a small flourish of her hand his rash disappeared. "Second, you will fell compelled to go out in public, the more populated the better. And third, anyone who has a malady, ailment, infection or disease who comes within 50 feet of you will transfer it to you."
Ashmael being completely powerless had remained silent until now, he looked sad and terrified. "I'll surely die within days, heart disease, Parkinsons' or Alzheimer's, there are any number of terminal diseases."
Genie smiled darkly, "We wouldn't want that would we? We want your service to the community to last the rest of your natural days don't we? Fourth, any diseases or infections you catch will not be severe enough to kill you. Fifth, your body will immediately begin attacking whatever you pick up and you will cure yourself of any disease within a week of catching it determined by it's severity. This will leave you in a state of permanent ever changing sickness. but you will be helping all those around you! And perhaps one day you will have cured everyone and will have a good day or two."
With that Genie bowed and disappeared.