vaccine

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vac|cine /v'æksiːn, AM væks'iːn/ (vaccines)
[N-MASS]
A vaccine is a substance containing a harmless form of the germs that cause a particular disease. It is given to people, usually by injection, to prevent them getting that disease.
Anti-malarial vaccines are now undergoing trials...
Seven million doses of vaccine are annually given to British children.

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