Allergy Planet

We are in the grip of an allergy epidemic. Fifty years ago one in 30 were affected, but in Britain today it is closer to one in three. Why this should be is one of modern medicine's greatest puzzles. In search of answers, Horizon travels round the globe, from the remotest inhabited island to the polluted centres of California and the UK. We meet sufferers and the scientists who have dedicated their lives trying to answer the mystery of why we are becoming allergic to our world.

Other episodes for this season

How to Kill a Human Being
Episode 1 - How to Kill a Human Being
Total Isolation
Episode 2 - Total Isolation
What on Earth is Wrong With Gravity?
Episode 3 - What on Earth is Wrong Wi...
Is Alcohol Worse than Ecstasy?
Episode 4 - Is Alcohol Worse than Ecs...
How to Make Better Decisions
Episode 5 - How to Make Better Decisi...
How to Live to be 101
Episode 6 - How to Live to be 101
Prof. Regan's Supermarket Secrets
Episode 7 - Prof. Regan's Supermarket...
Are we Alone in the Universe?
Episode 8 - Are we Alone in the Unive...
How Much is Your Dead Body Worth?
Episode 9 - How Much is Your Dead Bod...
How Does Your Memory Work?
Episode 10 - How Does Your Memory Work...
The President's Guide to Science
Episode 11 - The President's Guide to...
How Mad Are You? (1 of 2)
Episode 12 - How Mad Are You? (1 of 2)
How Mad Are You? (2 of 2)
Episode 13 - How Mad Are You? (2 of 2)
Jimmy's GM Food Fight
Episode 14 - Jimmy's GM Food Fight
Do You Know What Time It Is?
Episode 15 - Do You Know What Time It...
Allergy Planet
Episode 16 - Allergy Planet
Where's My Robot?
Episode 17 - Where's My Robot?