The immune system is a complex and dynamic network of cells, membranes and organs. These entities all work together to protect us from infection and potential pathogens which include the opportunistic microbes, bacteria, viruses, fungi and parasites that are all around us – in the air that we breathe, the food we eat, the surfaces we touch. When potential pathogens enter the body, the immune system springs to work, neutralising them and eliminating them.

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