A poster (b/w and colour versions included) showing the three lines of defence present within the non-specific (innate) immune system.

This resource was first published in ‘Immune System’ in January 2015 and is reproduced here under a Creative Commons Attribution 4.0 licence

‘Big Picture’ is a free and impartial educational resource that explores the innovations and implications of cutting-edge science. It sets out to connect modern biomedical science with its ethical and social challenges (including looking at how research impacts on individuals) and place bioscience research in a historical and cultural context. For more, visit bigpictureeducation.com/resources.

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