Vaccines - PowerPoint PPT Presentation

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Vaccines

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A vaccine is a biological agent that provides active acquired immunity to a particular disease. A vaccine usually contains an agent that resembles a disease-causing microorganism. It is often made from killed or weakened forms of the microbe, its toxins or one of its surface proteins. – PowerPoint PPT presentation

Number of Views:14
Date added: 13 April 2018
Slides: 9
Provided by: BellaSmith2018

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