Risk management.
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The reason why one case of influenza does not confer lifelong immunity is that the virus tends to mutate overtime which makes it unrecognizable to the immune system.
<h3>Why is it difficult to get immunity to influenza?</h3>
Influenza is caused by a virus which tends to mutate overtime in order to stay ahead of medical technology.
As a result, this mutation makes the original virus unrecognizable to the immune system which would then be unable to fight it.
Find out more on natural immunity at brainly.com/question/21480961
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Answer:
Throughout the first half of the 19th century, “free suffrage” was the goal of men who believed that they did not need to own property to have an interest in the fortunes of their country or to exercise sound judgment on its behalf. They agitated to change state constitutions and abolish property requirements for voting. This cane bearing their slogan was likely carried in parades. Some men in power shared their philosophy. Others found the growing power of the “common man,” the shifting American economy, and the need for new voters to support their own new political parties were compelling reasons to support free suffrage.
Explanation:
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