A Matter of Self-Defense

Jan 07, 1974 on BBC TWO at 9:00 PM
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Summary

This episode of Horizon explains how our body fights infections and cancers and brings us up-to-date on recent research in immunology.

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Kula, a Reason for Giving
Season 1973 Episode 33

Dec 24, 1973

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Bird Brain - The Mystery of Bird Navigation
Season 1974 Episode 2

Jan 14, 1974