If you are referring to 'Chicken Boy' whom posts videos of himself on YouTube (RIP), then he suffered from Hutchinson Gilford Syndrome. This is a rare condition that symptoms strongly resemble human aging, but occur in young children.
Symptons
Growth failure during the first year of life
Narrow, shrunken or wrinkled face
Loss of eyebrows and eyelashes
Large head for size of face (macrocephaly)
Open soft spot (fontanelle)
Small jaw (Micrognathia)
Dry, scaly, thin skin
exploding chicken disease is a rare disease in males ages 9-12
The main character of Chicken Boy is Tobin McCauley.
chicken pox
Chicken Pox
chicken pox!
chicken pocks
Bird flue and salmonella
It is a noun (chicken pox is the name of a specific disease).
Chicken pox is an acute, self-limiting, contagious disease caused by a virus.
chicken pox and shingles
It has a Respiratory Disease.
chicken pox