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University Press returns with another short and captivating book – a brief history of the immune system. The immune system is an extraordinary network of biological processes that work together to protect an organism from infection and disease, whether that be from a virus, bacteria, mold, parasite, or splinter. Our immune system has evolved for millennia and has developed a powerful ability to detect a broad range of pathogens and alien objects, combat and remove them from the body, and maintain health. The history of the immune system is a history of evolution – an ongoing process in which pathogens and the immune system compete to outpace each other. Now, however, thanks to modern medicine, we have better ways to support and enhance the immune system than our ancestors ever did – and we enjoy longer lifespans because of it. This short book provides a captivating account of the complex network of cells and proteins that defends our bodies against deadly infections – an account that you can read in about an hour.