PART A
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
PART B
For this Week Critical Thinking Exercise, you will answer the following questions using your critical thinking and reasoning skills:
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.
2. 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.
3. 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.

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