Aids- is a viral disease caused by humanimmunodeficiency virus. Main causes are unprotected sexual intercourse and blood to blood contact with infected person. Initially, there are no symptoms but as the disease progresses, the immunity of body decreases and number of diseases like
fever,
diarrhoea,
dysentery or
pneumonia occurs. Prevention is by using condom during sex and avoiding blood to blood contact. All organs are affected.