Not to scare you, but if it's pox not only do you need to isolate the bird but you need to practice safe handling methods. Wear disposable gloves when handling the bird, dispose of bedding and waste in a plastic bag, don't wear shoes from one pen to the next so that you don't cross contaminate.
I had a young turkey with pox last year who did not survive it, though most birds do if they are otherwise healthy. There is external and internal pox and they can have one or both forms of it. Internal pox (lesions inside the mouth and airway) is almost always fatal. If the lesions get into it's eyes, your local feed store can provide you with an opthalmic ointment. Your vet can provide you with an antibiotic to add to it's water to prevent secondary infections. Don't do anything with the lesions and they will dry up and fall off. Best of luck to you. (picture of peep peep below)