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Vaccines help prevent diseases caused by microbes like polio, tuberculosis, and chicken pox by exposing the body to weakened or dead forms of the microbes. This allows the immune system to develop antibodies that will protect against the actual diseases without risking illness. Vaccines have been very effective in reducing cases of once common diseases like polio and plague.
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- 1. Vaccine http://www.flickr.com/photos/alvi2047/3483848619/
- 3. Polio http://www.flickr.com/photos/unicefsverige/4415954257/
- 4. Sick http://www.flickr.com/photos/spcbrass/369210589/
- 7. Microbes http://www.flickr.com/photos/ideonexus/2515152714/
- 8. Protozoa http://www.flickr.com/photos/46183897@N00/5374758002/
- 9. Chicken Pox http://www.flickr.com/photos/mricon/1837263/