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A vaccine is a biological preparation that provides active acquired immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or o |
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Answer» pes of vaccines are CURRENTLY AVAILABLE: Live VIRUS vaccines use the weakened (attenuated) form of the virus. The measles, mumps, and rubella (MMR) vaccine and the varicella (CHICKENPOX) vaccine are examples |
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