Anatomy just answer (4 sentences for each+ work cited)

Each year, many people get a flu shot to protect themselves from the flu.

Why give flu shots rather than "booster" injections? Why is last year’s flu shot ineffective against this year’s flu?

As a class, discuss which of the following methods would be the best type of vaccination for fending off the flu, and explain your reasoning:

A. IM (intramuscular) Injection

B. Nasal Spray

C. ID (intradermal) injection

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q2/1. In treating a woman for malignancy in the left breast, the surgeon removes some of her axillary lymph nodes. Following surgery, the patient experiences edema of her left arm. Explain why.

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q3/Anti-B antibodies of a type A mother rarely affect the RBCs of a type B fetus. Yet anti-D antibodies of an Rh– woman sometimes cross the placenta and hemolyze the RBCs of an Rh+ fetus. Explain this difference based on your knowledge of the five immunoglobulin classes.

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q4/How does the structure of a B cell differ from that of a plasma cell? Explain how their structural difference relates to their functional difference.