Why Is There No Lifelong Vaccine Protection Against Influenza as There

question 14

Multiple Choice

Why is there no lifelong vaccine protection against influenza as there is for measles?

• A) Influenza vaccines do not generate an immune response.
• B) Influenza can escape host immunity by evolving new variants that reinfect hosts.
• C) Influenza is too virulent to effectively vaccinate against.
• D) The antigenic memory against influenza has a short half-life.

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Definitions:

Good Y

An alternative characterization of a product or commodity that satisfies consumer needs or desires, often used in comparative analyses.

Budget Constraint

The limitations on household expenditures, based on the combination of income, prices, and available goods or services.

Bratwursts

A type of German sausage made from pork, beef, or sometimes veal, known for its flavor and seasoning.

Budget Constraint

A limit on the consumption possibilities of an individual or entity, dictated by their income and the prices of goods and services.