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A vaccine usually contains a small amount of the disease that you are trying to ward off. The body reacts by developing 'antibodies' specific little soldiers in our blood designed to attack that particular disease.

2007-06-16 13:34:46 · answer #1 · answered by megalomaniac 7 · 0 0

vaccinations cause your body to develop an immunity....

2007-06-16 14:03:24 · answer #2 · answered by mago 5 · 0 0

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