Are there any lesions or pox inside her beak?
Looks like she's having a rough time and may be being plucked and picked at in addition to the Fowl Pox.
Does she have infection in her ears too?
Gently open each eye and lightly flush with saline to help sooth them. Take a dot of Terramycin eye ointment and put it in each eye.
For the scabs on her beak, combs and wattles, you can paint those with Iodine to help them dry up.
If she's not eating/drinking on her own, work on that. Hydration first, then offer wet mash, it may be easier for her to handle that instead of pellets or crumbles. Scrambled egg may also be enticing.
Let us know what you find in the ears and inside the beak.