Homework: prices: free, controlled, and relative (ch 04)May 15, 2021reflection survey – Essay WritersMay 15, 2021 A vaccine is a biological substance prepared from a causative agent of a given disease. This agent is then injected into the body so as to produce antibodies aimed at providing immunity against a disease or diseases. Some types of vaccines include messenger RNA vaccine, inactivated vaccine, viral vector vaccines, toxic vaccines, live attenuated vaccines, and conjugate vaccines.4 days ago “Is this question part of your assignment? We Can Help!”
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