The immune system is one of the most important systems of the
human body. It is very similar to a computer’s antivirus system.
The system searches for viruses and cleans all the cells in the
body. The cells that do this are called lymphs. The lymphs are
produced in bone marrow, the appendix, spleen, tonsils, and
thymus. The lymphocytes are one of the many types of lymphs.
There are nearly one trillion lymphocytes in a body. Another
type of cell is the CD4+ cell. The HIV/AIDS virus attacks the
CD4+ cells so they can not function properly. The purpose of the
CD4+ cells is to recognize that a virus has entered the body and
alert the rest of the immune system. It is also supposed to
memorize the structure of the invading virus. If the CD4+ cells
are destroyed, your immune system will not know to fight of the
disease and, you will become susceptible to the same disease
multiple times. When a person is given a shot, the doctor is
injecting a dead version of a virus into them. The immune system
(CD4+ cells) then rea