Developing an AIDS Vaccine Is Not Impossible, as Some Skeptics

question 205

Multiple Choice

Developing an AIDS vaccine is not impossible, as some skeptics claim. Research suggests that the human immune system is better at fighting HIV than was originally thought. Most of those infected suppress the virus for years without developing AIDS. A small number never contract the virus despite repeated exposures. If we can figure out the mechanism that accounts for this, we'll have clues about how to engineer a vaccine. Seth Berkley, "Don't Quit on an AIDS Vaccine"

• A) Argument; conclusion: If we can figure out the mechanism ... engineer a vaccine.
• B) Nonargument.
• C) Argument; conclusion: Most of those infected ... without developing AIDS.
• D) Argument; conclusion: Research suggests ... than was originally thought.
• E) Argument; conclusion: Developing an AIDS vaccine ... skeptics claim.

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Definitions:

Characteristics

Distinctive features or qualities that identify and distinguish something or someone.

Desired Outcome

The intended result or goal that an individual, organization, or policy aims to achieve.

Actual Outcome

The real result or end-product of a process, as opposed to the expected or theoretical outcome.

Calories

A measure of energy in food, scientifically defined as the amount of energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius.