The answer is True
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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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The correct answer is <span>Department of State
This is the equivalent of foreign ministries that other countries have and it is in charge of advising the president on foreign issues and executing foreign policies designed by the president and the congress. It is led by a secretary of state who changes as the president changes.
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This is the law that states that for every action there is a reaction. The force that you hit the table with returned and reacted upon you. Due to this reaction, the coffee in your cup spilled.
