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The human virome is the collection of all the viruses in the human body. Viruses are the most abundant infectious agents on the planet. These include viruses that cause acute self-limiting or uncontrolled infections, persistent and chronic infections that may or may not be asymptomatic, or latent infections, they also include viruses that are integrated in the human genome.〔 Humans are constantly exposed to a variety of viruses that are genetically diverse and have new genotypes, strains and species that evolve rapidly.〔 Every human being has a unique virome with a unique balance of species that can change quickly.〔 Lifestyle, age, geographic location, and even the season of the year affects an individual's exposure to viruses; while their susceptibility to disease is effected by preexisting immunity and both viral and human genetics. The first virus that was discovered was the Tobacco mosaic virus in 1892 and viruses are still being discovered today. With today's technological advances, more viruses are rapidly being discovered in the environment and within the human body. ==Health effects== The human virome is a part of our bodies and will not always cause harm. Many latent and asymptomatic viruses are present in the human body all the time. Viruses infect all life forms; therefore the bacterial, plant, and animal cells and material in our gut also carry viruses.〔 Through one's immune system, the body has the ability to protect itself from other viruses that may cause disease. When viruses cause harm by infecting the cells in the body, a symptomatic disease may develop. Contrary to common belief, harmful viruses may be in the minority compared to benign viruses in the human body. It is much harder to identify viruses than it is to identify bacteria, therefore our understanding of benign viruses in the human body is very rudimentary.〔 The health effects of viruses on an individual are dependent on the individual's immune function and cell surface proteins, which are determined by genetics and vary with genetic polymorphisms across the population and over time in relation to age and other factor determining immune status.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Human virome」の詳細全文を読む スポンサード リンク
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