Disease the time between infection and the appearance of symptoms. The latency period is the time between infection and the ability of the disease to spread to another person, which may precede, follow, or be simultaneous with the appearance of symptoms. Some viruses also exhibit a dormant phase, called viral latency, in which the virus hides in the body in an inactive state. For example, varicella zoster virus causes chickenpox in the acute phase; after recovery from chickenpox, the virus may remain dormant in nerve cells for many years, and later cause herpes zoster (shingles). Diseases may be classified by cause,
Disease mongering Disease mongering ] Disease mongering is a term for the practice of widening the diagnostic boundaries of illnesses and aggressively promoting their public awareness in order to expand the markets for treatment. Among the entities benefiting from selling and delivering treatments are pharmaceutical companies, physicians, alternative practitioners and other professional or consumer organizations. It is distinct from the promulgation of bogus or unrecognised diagnoses. The term “monger” has ancient roots, providing the basis for many common compound forms such as cheesemonger, fishmonger, and fleshmonger for those who peddle such wares respectively. “Disease mongering” as a label for the "invention" or