Story Essay Example | Topics and Well Written Essays - 750 words - 5

Story - Essay Example r which diseases are to be considered rare as a disease may be seen as rare in a one part of the globe, or in a specific population of people but remain common in a different one. Prevalence, which defines the number of people affected by a disease at a certain time, rather than incidence, which denotes the number of diagnoses in a particular year, is issued in the description of rare diseases and this has resulted in estimates that rare diseases affect more than three hundred million people all over the world. Since the prevalence of rare diseases varies between different populations, a disease that is rarely diagnosed in one population may be very common in a different population. This is particularly true in the case of genetic diseases as well as infectious diseases such as cystic fibrosis, which is a genetic disease that is rare in Asia but comparatively common in Europe and people who originate from the continent (Posada de la Paz & Groft, 2010). Numerous infectious diseases are prevalent in specific geographic areas but rare in the rest of the areas while other diseases including numerous rare forms of cancer do not have a specific pattern of distribut ion, as they are just rare. Categorization of additional conditions is dependent partly on the population that is being considered, with all types of cancer in children typically being considered rare as a limited number of children develop cancer but similar forms of cancer may be more prevalent in the adults. Most of the rare diseases are genetic; an estimated eighty percent, and this makes them chronic while other diseases that are rare occur as a result of people being infected and being allergic to certain things or from causes that are degenerative and proliferative. The categorization of the degree of a disease’s rarity is dependent upon the population under study, additionally; signs and symptoms of a number of the rare diseases might be seen at birth or during childhood while others only become