AIDS is a disorder due to HIV (Human Immuno Deficiency Virus). HIV is enveloped within a membrane which is made up of a several $GP\, 120$ and $GP\,41$ glycoprotein. Both of the proteins resemble spike dots, which gene the horse chesnut appearance to virus. The core (central part) of virus contain two $ssRNA$, reverse transcriptase enzyme, $P -15$ protein which is associated with RNA, inner covering of $P-24$ and outer covering fo $P-28$.
