This resource explores how the immune system
recognises and destroys pathogens such as bacteria and viruses inside the body.
It considers how vaccination
enables the body to respond more
quickly to future infection by that pathogen, immune memory and herd immunity. It concludes with consideration of the advantages and disadvantages of
monoclonal antibodies for treating disease.
Highly-magnified, digitally-colourised image of the virus H1N1,
sometimes called "swine flu".
Photo courtesy of CDC/Cynthia Goldsmith
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