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9 January, 19:59

3. What are vaccines? Are there different types?

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  1. 9 January, 20:54
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    A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. Yes there several different types of vaccines.
  2. 9 January, 22:16
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    Answer:Four types 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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