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    Rights: Crimfants Published 18 October 2010 Size: 21 KB Referencing Hub media

    Skin, tears and mucus are part of the first line of defence in fighting infection. They help to protect us against invading pathogens.

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      The body’s first line of defence

      Your body has a two-line defence system against pathogens (germs) that make you sick. Pathogens include bacteria, viruses, toxins, parasites and fungi. The first line of defence (or outside ...

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