IMMUNOLOGICAL RESPONSES TO VIRAL INFECTIONS
Abstract
Viral infections are illnesses brought on by microscopic creatures known as viruses that take advantage of your cells in order to multiply. Viruses can infect most other regions of the body, but they are often responsible for respiratory and digestive diseases. Viruses are one type of germ (pathogen) that are so little that they are only visible under a microscope. Each virus carries a small amount of genetic material (DNA or RNA) inside its protective capsid. It can be compared to an envelope with instructions. Conversely, our cells function similarly to a whole factory: They provide all the necessary tools and instructions to complete them. These guidelines advise us how to produce more cells and proteins. Since viruses lack cells, they lack all the "machinery" necessary to replicate themselves, unlike you and me. Therefore, in order to repeat their instructions, they must enter our cells and utilize our machineries. What causes a viral infection is the replication of viruses. Adaptive immunity arises after being exposed to an antigen from an illness or vaccination. Compared to the adaptive, or acquired, immune response, which takes days or even weeks to develop, the innate immune response happens far more quickly.
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