BBC News 
Thursday, November 26, 2009
An implant placed under the skin can instruct the immune system to attack and kill cancer cells, at least in mice, say researchers.
It is the first “cancer vaccine” delivered in the form of a plastic implant that can destroy tumours, say the Harvard University team.
It works by attracting certain immune cells and showing them what the tumour in question looks like.
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Cancer Research UK said that vaccine research was showing “real promise”.
Cancer cells are good at evading the immune system because the body does not recognise them as “foreign”.
Full story here.