What is a virus? How do viruses work?


What is a virus and how does it live

It is believed that viruses are unique in nature and, characteristically, little studied. Nevertheless, the researchers argue that the transmission of viruses and their mechanism of insertion into a life-capable organism is one. The herpes virus is considered to be the most common and resistant, besides this virus is the most studied from the point of view of viability and reproduction (oddly enough, this term also applies to viruses). About eight types of herpes simplex are known, but only two have spread widely.


"Life" of the virus on the example of herpes


Virusherpes simplexType 1 affects the upper body. Infection with this type of virus occurs through everyday life and often at an early age. Unwashed dishes, dirty hands, the kiss of the patient - all this allows the microorganism to move to the skin of a healthy person. And then begins the aggressive impact of the virus, which is looking for a weakened living cell to be inserted into it. The cells of the mucous membranes are most vulnerable, they are distinguished by a thin membrane in which viruses can easily make a dent.It is the ability of viruses to find the thinnest membrane, as well as the painstaking and consistent work on its destruction for a long time agitated the minds of scientists with the idea of ​​viruses being reasonable.



Having penetrated into the body, the virus either absorbs the cell or causes it to mutate. By itself, herpes, like any virus - a parasite, it lives only at the expense of the cell into which it fell. If the cell type, its composition and environment are alien to it, or it is outside its limits, the virus takes over the functions of a biopolymer, then it is said that the person is infected (carrier), but the virus is not active. Most often, children adopt the "parasite" from a parent with an active form of the disease.


Depending on what type of nucleides has an active virus, it acts on human DNA or on its RNA.


Herpes simplex virus type 2, calledgenital, affects the lower body. It is transmitted through sexual intercourse, as well as from a sick mother to a baby during childbirth. The peculiarity of viruses of this type in their selectivity, they settle exclusively on the mucous membranes, while the attack does not begin immediately. The duration of the incubation period is from 2 to 14 days.Once in the human body, the HSV remains in it forever.


The most common symptoms are redness and the appearance of bubbles at the site of injury. These phenomena are accompanied by itching, fever, headache, nausea and general weakness. About half of the infections are asymptomatic, difficult to treat. The virus in this case causes latent harm to the sexual and reproductive function of the person.



Video: Viruses: Molecular Hijackers

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