He does not measure more than 30 milionésimos of mm. Cause flu,, measles, paralysis, smallpox, AIDS and so on. Do not feed
or breathe, or produce anything, but is able to multiply there. Therefore, it is taking advantage of the mechanisms of the cells where it hosts, then the sacrifices. They are known around of 1000 species of virus, responsible for 60% of the diseases in animals and plants. At each step, discovers is the presence of virus which does not suspeitava. It found one in the net spinal, 17 of 50 schizophrenic examined. The
antibodies are a threat from the body against foreign agents, are like missiles teleguiados. Diseases viróticas in general remained a mystery until the invention of the electron microscope in the decade to 1940. The equipment allows see the virus, which in Latin means poison, which was isolated and photographed for the first time in the 1950''s. Many antibodies live and die ingloriamente without finding the antigen for which it was made and hang it with a battle of life or death. The vaccine is composed of always inactive or attenuated virus, whose job is to draw the attention of the antibody, which aroused fight with the wrong virus. When unprepared, the cell receives the virus amicably, without realizing that this is a
strange full of bad intentions. The betrays guest host, runs to the core, a kind of brain of the cell and it takes the commands. The cell will produce more and more compulsively virus, until the very full, it burst, proliferating more virus, which invaded neighboring cells. In that have RNA are called retroviruses, where an enzyme found inside an envelope of the virus has to turn the RNA into DNA, because this is the only acid able to enter the nucleus. Drugs such as AZT seek hamper the life of the AIDS retrovirus, eliminating this enzyme. The body, to feel the presence strange, sends white blood cells of the blood, called macrophages that swallow the infected cell. The existing T cells in the blood begin to manufacture the antibodies tailor who kill or neutralizam the virus. The production of these delay of 3 to 7 days, the AIDS virus attacks the cells just T. This happening, it is open space for a number of opportunistic infections. They do not appear if the T cells operate normally. The influenza virus is one of the mutants, losing only to that of AIDS, where each generation not even a tough month.