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Annual flu shots work by: A. increasing the volume of lymph, B. increasing the number of...

Annual flu shots work by: A. increasing the volume of lymph, B. increasing the number of white cells, C. increasing the number of specific antibodies, D. introducing a relatively innocuous virus to fight off a more dangerous virus.

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Answer #1

Ans. Correct option- C. Increasing the number of specific antibodies.

Annual/seasonal flu shots trigger the onset of antibodies production in body against the specific viral antigens. Since virus mutate rapidly, the flu vaccine for current year/season may not work efficiently against the mutated viruses next year/season.

# Option A- Incorrect. It does not affect volume of the lymph.

# Option B- Administration of flu vaccine indeed increases the clonally selected lymphocytes, especially plasma B cells that produce antibodies. However, it is the virus-specific antibody that directly and immediately fights against viral infection. Due to rapid mutations viral antigen, the lymphocytes are most likely to become ineffective the next season.

#Option- D. Incorrect. Flu virus does not kill another flu virus.

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