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Even as you read this, your body is under attack. Your enemy is patient, adaptable, potentially deadly, and invisible. Viruses range from the common cold to HIV and have caused epidemics more decimating than war. Segments include the following:
- Understanding: Viruses: See how these submicroscopic parasites operate and how your immune system works to defend you.
- Fighting Disease: Learn how scientists are waging war against cold and flu viruses.
