This resource explores how the immune system recognises and destroys pathogens such as bacteria and viruses inside the body.
s 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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