The reason we become sick with the flu a second time (and more) is because the s

Question

The reason we become sick with the flu a second time (and more) is because the second time was caused by a flu virus that had a different ______. What type of immunity is it called when we develop immunity only after being exposed to the disease-causing organism? In order to be protected from the same antigenic organism the second and third time, etc. the body needs to have what kind of lymphocyte present? What two types of antibody creates the 'a' agglutinins of a type B patient? Which of the following makes the patient sick? (antigens or pathogens)

Explanation / Answer

Question: 6. The reason we become sick with the flu a second time (and more) is because the second time was caused by a flu virus that had a different _.

Answer: Antigen

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