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    • Close up of a skin infection from a cut.
    Rights: Jennifer Seiber Published 18 October 2010 Size: 23 KB Referencing Hub media

    If pathogens are able to get past the first line of defence, for example, through a cut in your skin, an infection develops.

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      The body’s second line of defence

      If the pathogens are able to get past the first line of defence, for example, through a cut in your skin, and an infection develops, the second line of defence becomes active. Through a sequence ...

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