Core democratic values<span> are the fundamental beliefs and </span>constitutional<span> principles of American society, which unite all Americans. These </span>values<span> are expressed in the Declaration of Independence, the United States </span>constitution<span> and other significant documents, speeches, and writing of the nation.</span>
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:
The answer is ✰ The Crust ✰
Explanation:
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Please write This homework in Informal letter
you are Joe or Gabriel. write a letter to your friend describing your boarding school in about 120 to 140 word's anwer it guys in right way be fast Please HELP