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.
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Answer: The option which is correct regarding the quality of life is:
a) Factors that influence quality of life vary a great deal in different countries.
Explanation: Factors that influence the quality of life in developed countries is far more favorable to the factors that influence the quality of life in a developing country likewise an under-developed country. So therefore, the quality of life greatly varies in different countries.
Answer: Memory construction
Explanation:
Here , in this case the process through which Karl and Dee are going through best illustrates the nature of <em>memory construction</em>. Here, the memory construction tends to infer in the past of Karl and Dee from their stored information further in the addition to what they have been assuming now. This effect is mostly known to incorporate misleading information into an individuals memory.
