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Immune System

Explore how our bodies are designed to prevent potentially harmful objects from getting inside, and what happens when foreign organisms or substances breach these barriers.

Pick of the week

Video: Living with early-onset arthritis

Rheumatoid arthritis is a debilitating and painful condition that affects some 400,000 people in the UK. But it’s not just a disease of ageing. In this three-minute video, meet young mum Charlotte who explains how severe arthritis affects her life.

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Fast Facts

Each issue of 'Big Picture' comes with a sprinkling of Fast Facts, fascinating snippets of information on the topic covered.

Browse through all of our Fast Facts indexed by topic