An overview of the immune system

@article{Parkin2001AnOO,
  title={An overview of the immune system},
  author={Jacqueline Parkin and Bryony Cohen},
  journal={The Lancet},
  year={2001},
  volume={357},
  pages={1777-1789}
}
We are continually exposed to organisms that are inhaled, swallowed, or inhabit our skin and mucous membranes. Whether these organisms penetrate and cause disease is a result of both the pathogenicity of the organism (the virulence factors at its disposal) and the integrity of host defence mechanisms. The immune system is an interactive network of lymphoid organs, cells, humoral factors, and cytokines. The essential function of the immune system in host defence is best illustrated when it goes… Expand

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