What is the relationship that exists between a virus and human when infects human?
The relationship between a virus and a human when the virus infects the human is known as parasitism. Parasitism is a biological relationship in which one organism, the parasite, benefits at the expense of another organism, the host. In the case of a virus infecting a human, the virus is the parasite and the human is the host.
Viruses are obligate intracellular parasites, which means that they can only reproduce inside the cells of a host organism. When a virus infects a human, it enters the human's cells and uses the cell's machinery to replicate itself. This replication process can damage the host cell and can lead to symptoms of illness. In some cases, viruses can also cause serious diseases, such as influenza, measles, and AIDS.
The human immune system is designed to protect the body from infection by viruses and other pathogens. However, some viruses are able to evade the immune system and cause infection. This can occur for a number of reasons, including:
* The virus may be able to rapidly change its appearance, so that the immune system cannot recognize it. This is a common strategy used by influenza viruses, which are responsible for the common flu.
* The virus may be able to hide inside cells of the immune system, so that the immune system cannot reach it. This is a strategy used by HIV, the virus that causes AIDS.
* The virus may be able to produce proteins that interfere with the immune system. This is a strategy used by some herpesviruses.
Despite the challenges posed by viruses, the human immune system is usually able to clear an infection eventually. However, some viruses can cause chronic infections, which can last for months or even years. These infections can cause serious health problems and can lead to death.
There are a number of ways to prevent infection by viruses, including:
* Getting vaccinated. Vaccines are available for a number of viruses, including influenza, measles, and polio.
* Practicing good hygiene. This includes washing your hands frequently, covering your mouth and nose when you cough or sneeze, and avoiding contact with people who are sick.
* Using condoms during sex. This can help to prevent infection by viruses that are transmitted sexually, such as HIV.
If you think you may have been infected by a virus, it is important to see a doctor so that you can be properly diagnosed and treated.