To prevent a disease caused by a certain microbe, doctors inject the same microbes in a person's blood. How is it ensured that this prevents the disease instead of causing it? What is this process of injecting microbes called?

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Solution

The microbes that are injected in a person's blood to treat a disease are either killed or weakened prior to their administration. This ensures that the microbe do not cause any harmful effects in the body. The process of injecting microbes in the body to prevent diseases is called vaccination or immunization.

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