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Chapter 32: Defenses against Disease

The Spread of HIV

32.1 Defense Systems: Distinguishing Self from Nonself

32.2 First Line of Defense: Physical and Chemical Barriers

32.3 Second Line of Defense: The Innate Immune System

32.4 Third Line of Defense: The Adaptive Immune System

Why Is AIDS So Deadly, and How Can It Be Treated?

Biology in the News: Lack of Success Terminates Study in Africa of AIDS Prevention in Women

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