Poster of Cast and Crew in Horizon - Season 11 - Episode 1 - A Matter of Self-Defense

Horizon - Season 11 - A Matter of Self-Defense (Episode 1)

Plot: This episode of Horizon explains how our body fights infections and cancers and brings us up-to-date on recent research in immunology.
Episode Aired On:
Monday, January 7 1974
51 years ago