Why Are Secondary or ʺBoosterʺ Reimmunizations Given

question 93

Multiple Choice

Why are secondary or ʺboosterʺ reimmunizations given?

• A) Secondary immunizations are necessary for an innate immune response.
• B) Secondary reimmunizations produce a secondary immune response and boost antibody titers.
• C) Secondary reimmunizations produce a phagocytic immune response that is longer lasting than the primary immune response.
• D) Frequent secondary reimmunizations are needed because the immune system doesnʹt remember antigens for more than a few years.

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Definitions:

Discount Rate

In finance, this rate is used to calculate the present value of future cash flows; in a broader context, it can also refer to the interest rate charged by banks to their most creditworthy customers.

Annual Cash Inflow

The total amount of money received from operations, investments, and financing activities within a year.

Net Present Value

A financial metric that calculates the difference between the present value of cash inflows and the present value of cash outflows over a period of time.

Project Profitability Index

A financial metric that compares the present value of a project's expected cash flows to its initial investment, used to evaluate the relative profitability of investments.