A Matter of Self-Defense

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

Other episodes for this season

A Matter of Self-Defense
Episode 1 - A Matter of Self-Defense
Bird Brain - The Mystery of Bird Navigation
Episode 2 - Bird Brain - The Mystery...
Never Too Late to Learn
Episode 3 - Never Too Late to Learn
The Great Fish Hunt
Episode 4 - The Great Fish Hunt
Pedal Power
Episode 5 - Pedal Power
The Writing on the Wall
Episode 6 - The Writing on the Wall
Where Did the Colorado Go?
Episode 7 - Where Did the Colorado Go...
The Future Goes Boom
Episode 8 - The Future Goes Boom
Fusion: The Energy Promise
Episode 9 - Fusion: The Energy Promis...
The First Ten Years
Episode 10 - The First Ten Years
This Yankee Dodge Beats Mesmerism Hollow
Episode 11 - This Yankee Dodge Beats M...
The Hunting of the Quark
Episode 12 - The Hunting of the Quark
A Noah's Ark for Europe
Episode 13 - A Noah's Ark for Europe
Bridges: When It Comes to the Crunch
Episode 14 - Bridges: When It Comes to...
Search for Life
Episode 15 - Search for Life
The Secrets of Sleep
Episode 16 - The Secrets of Sleep
Who Needs Skills?
Episode 17 - Who Needs Skills?
Hills of Promise
Episode 18 - Hills of Promise
The Race for the Double Helix
Episode 19 - The Race for the Double H...
The Immigrant Doctors
Episode 20 - The Immigrant Doctors
Mines, Minerals and Men
Episode 21 - Mines, Minerals and Men
What Price Steak?
Episode 22 - What Price Steak?
Listen and Be Loyal
Episode 23 - Listen and Be Loyal
Adam or Eve?
Episode 24 - Adam or Eve?
An Unholy Scramble
Episode 25 - An Unholy Scramble
Do as You Are Told
Episode 26 - Do as You Are Told
The First Signs of Washoe
Episode 27 - The First Signs of Washoe
The Other Way
Episode 28 - The Other Way
The Greatest Advance Since the Wheel?
Episode 29 - The Greatest Advance Sinc...
Joey
Episode 30 - Joey
The Neglected Harvest
Episode 31 - The Neglected Harvest
How on Earth Did They Do That?
Episode 32 - How on Earth Did They Do...
The Lysenko Affair
Episode 33 - The Lysenko Affair