Virus

There have some common types of virus these are responsible to cause of human death are given bellow, HIV: HIV is a specific types of virus that causes AIDS HPV: HPV is Human Papilloma Virus that causes Cervical cancer in women Retrovirus: Retrovirus causes Rabies and causes human death.

Virus is a microorganism that have two unique properties that it behave like living organ when it is hosted by a living organ and behave like non living organ when it is independent in nature. Virus significantly causes harmful effect on living organ and caused disease. The difference of virus from bacteria is that bacteria is living in all environment, either it is hosted by living organ or independent in nature. But, virus only acts as living organ when it hosted by other living organ.