Infection occurs when the host is exposed to pathogens. the virus uses the cell metabolism, and replicates itself while destroying the cell or changing the cell's genetic makeup.
A virus is a tiny protein pocket with genetic material inside of it. Because they lurk inside cells, viruses present a significant challenge to the immune system of the body. Antibodies have a hard time getting to them because of this. Since the surface of infected cells changes as the virus multiplies, some immune system cells known as T-lymphocytes may recognize and kill cells containing viruses.
When viruses are discharged from infected cells, antibodies made in reaction to infection or prior immunization will effectively knock them out. Viral infections are not treated by antibiotics. Antiviral medications, therefore, differ from antibiotics in that they function by inhibiting viral enzymes instead.
Therefore, viruses are pathogens that utilize the metabolism of cells. can either kill the cell or alter its genetic makeup as it reproduces. Because viruses are so basic, they employ their host cells to carry out their functions.
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