Symptoms and Signs. In most young children, primary EBV infection is asymptomatic. Symptoms of infectious mononucleosis develop most often in older children and adults. The incubation period is about 30 to 50 days.The triad of fever, pharyngitis, and adenopathy is present in most patients. Fatigue can last months but is usually maximal during the first 2 to 3 wk.ymptoms and Signs. In most young children, primary EBV infection is asymptomatic. Symptoms of infectious mononucleosis develop most often in older children and adults. The incubation period is about 30 to 50 days.
A hair is a thin, flexible shaft of cornified cells that develops from a cylindrical invagination of the epidermis, the hair follicle. Each consists of a free portion or shaft (scapus pili) and a root (radix pili) embedded within the follicle.
Hair generally grows an average of 1/2 inch per month, with growth generally predetermined by a person's genetic code, meaning that it can only grow so fast. In a year, hair usually grows about 6 inches. As a person ages, hair growth can slow due to cell division also slowing. Hair growth is a result of cell division when new hair cells form in the root and push the hair forward. The new hair is always added at the root as the older hair inches downward slowly.