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.
If you liked our ‘Immune System’ issue, why not check out our ‘Influenza’ special issue? First published at the height of the H1N1 swine flu epidemic, it was reviewed and updated in December 2014, placing it in a wider context. It’s especially relevant given how potent the flu virus has been this winter.
Find out how you can get copies of ‘Big Picture’ when it’s published twice a year, in print and online. Find out more about subscribing to ‘Big Picture’
Each issue of 'Big Picture' comes with a sprinkling of Fast Facts, fascinating snippets of information on the topic covered.