Did they get picked on by other birds when they had the pox, or thereafter? If so, you're going to have to separate them until healed. You can apply neosporin to the effected areas as needed.
I recommend that you take a look inside the ear canal for infection, it appears swollen in the pic. I dont know if it's swollen from pecking or if there's an ear infection. Let us know what you see inside the ear canal.