Analysis of the 1918 and 2009 Flu Epidemics Reveals That

question 5

Multiple Choice

Analysis of the 1918 and 2009 flu epidemics reveals that the most likely scenario was that ________.

• A) the virus causing these outbreaks were derived from a single strain within which significant mutations changed the protein hemagglutinin
• B) these viruses switched from using RNA to using DNA
• C) the virus ultimately arose in birds, jumped to pigs, and then was able to switch to humans
• D) strong selection produces particularly virulent flu strains with predictable periodicity

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Definitions:

Spontaneous Remission

The unexpected improvement or cure of a disease or condition without medical intervention, often seen in cases such as cancer.

Major Depressive Disorder

A mental disorder characterized by a persistent and intense feeling of sadness or despair and a lack of interest in activities, significantly impairing daily functioning.

Symptoms

Observable signs or indicators of a disease, disorder, or condition, often reported by the patient.

Psychological Disorders

Conditions characterized by abnormal thoughts, feelings, or behaviors that cause distress or impairment in functioning.