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Otrada
3 days ago
14

The flu vaccine (administered as a shot or a nasal spray) is made of a combination of the different types of influenza viruses t

hat research indicates will be most common during the upcoming season. For each type of influenza, there are numerous specific viruses that can be selected for use in the vaccine. The vaccine works by introducing small amounts of these influenza viruses to the body. Their presence stimulates the immune system to create antibodies against these specific viruses that help protect the individual from becoming infected with them. Each year, the specific viruses used in the vaccine will vary. Based on what you know of evolution, why might this be the case
Biology
1 answer:
lana [1.7K]3 days ago
5 0

Answer:

This occurs due to the fact that viruses constantly change and adapt to their surroundings. Consequently, various strains emerge and are identified on a regular basis, necessitating updates to vaccines to ensure that immunity remains current and responds appropriately to viral changes without causing illness.

Explanation:

Viruses are acellular entities lacking their own metabolic processes or means of reproduction; they must infiltrate and commandeer the human body in order to integrate their DNA or RNA with human cells, using the host's cellular machinery for replication.

Moreover, as infections progress and new viruses develop, they can interact with bacteria to form bacteriophages, undergo mutations within a host infected by multiple viruses, and may even adopt mechanisms characteristic of retroviruses, evolving on a daily basis. These emergent viruses are referred to as new strains, which will require updates in vaccination strategies.

Vaccines function as a form of natural ACTIVE immunity; they introduce a portion of the virus into the body to trigger the generation of specific antibodies.

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