What is the relationship between exposure to a virus and developing an immunity to it? Cite evidence from the text to support your response. (From commonlit What is a vaccine?)

The human body is vulnerable to a variety of viruses, and acquiring immunity is a process that takes time.

Humans have always been exposed to various types of viruses, and the body has always dealt with viral diseases successfully. Humans are familiar with the flu virus, which has existed since the beginning of time. In such cases, the body becomes acclimated to the infection and creates cells that fight the virus over time. As a result, time plays an important role in developing immunity. As a result, the virus is not unknown to our bodies, as the human body has evolves over centuries to generate cells that resist infection.

When a new virus emerges, the problem occurs. Because the new virus is known to the human body, developing new cells to fight infection takes longer. We can use the so-called"shrimp" virus as an example to back up this claim.Once our bodies become infected with the virus, they develop immune to it, and we no longer have a problem with it.

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The human body is susceptible to different types of viruses and developing immunity is a relative thing.

Explanation:

Humans have always been exposed to different types of viruses, and the body has more or less successfully dealt with viral infections. The flu virus is well known to humans and has been around since the inception of humans. In such circumstances, the body is accustomed to this type of infection, and over time develops cells that fight the virus. So time is a significant factor in creating immunity. Therefore, it is not unknown to our body to mention the virus, because, over the centuries, the evolution of the human body has developed some cells that fight the infection.

The problem arises when some new virus is formed (as is the case at the moment). The new virus is unknown to the human body, so it takes more time to develop new cells to fight infection. To support this statement, we can give an example of the so-called "shrimp" virus. Once our body is ill with this virus, it becomes immune to this virus, and we will no longer have a problem with the virus. The fact that not all people have the same immune system should be mentioned here, so the fight of the organism with the illness dramatically depends on it. Vaccines are preparations that contain, in smaller quantities, the elements of a living or dead agent of a particular disease. By injecting it into the body, the body is used to such a condition, and it automatically creates elements that fight the virus. In this way, the body is stimulated to successfully fight a particular illness in the future or become immune. Some of the diseases we can protect against vaccines are measles, diphtheria, polio, and cough.

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