During Previous Flu Seasons, Small Variations in the Influenza Virus

question 42

Multiple Choice

During previous flu seasons, small variations in the influenza virus resulted in the immune system's inability to fully recognize and respond to flu exposure. As a result, vaccine effectiveness could be as low as 30%. This is an example of __________.

• A) antigenic drift
• B) antigenic shift
• C) artificial selection
• D) the founder effect

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Definitions:

Defining Characteristics

Distinctive features or qualities that enable the identification or definition of a concept, condition, or category.

Diagnostic Statement

A formal description of a patient's condition, disease, or injury based on a thorough evaluation of symptoms, tests, and assessments, used to guide treatment decisions.

Possible Risk

A potential hazard or danger that may lead to harm or adverse outcomes if not properly managed or avoided.

Etiology

The study of the causes or origins of diseases or medical conditions.