I have four other girls that are in various stages of chicken pox. One other has her eye looking all nasty like the one in the picture, the others have it just on their comb. We are going to bleach all the waterers and feeders today, and clean up the coop as best we can.
Do what
dawg suggested, in regard to that one's eye, or she'll likely lose the use of it.
For inside the coop, while the birds are using it? Wet it down a bit w/ a solution of plain ol' white vinegar, rather than using bleach inside. Fowl Pox spreads mostly buy direct contact, and it sounds like they've all been exposed by now ... at least, once it's run it's course? They're done w/ it -- unlike some diseases, like Merek's, birds infected by Fowl Pox are not forever carriers of the disease.
Giving your entire flock an astringent solution of about five teaspoons to the gallon of apple cider vinegar in their water (but never in galvanized metal) will help to boost their immunity, as the tannin in apple cider vinegar helps to reduce the viscosity of mucus and 'cut through' coatings in the mouth, throat and intestines, which helps 'em to better expel accumulations of mucus, and anything it contains, and improves the uptake of nutrients/minerals.
For the next few weeks, at least? Stay away from anybody else's flock(s), or clean up *really* well before you leave -- it's most probably on everybody's shoes, and in the carpet of your vehicles, and the faucets and doorknobs of your home ... I never go where other birds are, or have been, without scrubbin' up really well, and changin' out my boots before/after -- ridiculously paranoid, when it comes to bringin' anything in.