what are type of vaccine
Four types of vaccines are currently available: 1  Live virus vaccines use the weakened (attenuated) form of the virus. 2  The measles, mumps, and rubella (MMR) vaccine and the varicella (chickenpox) vaccine are examples.
There are two basic types of vaccines: live attenuated and inactivated. The characteristics of live and inactivated vaccines are different, and these characteristics determine how the vaccine is used. Live attenuated vaccines are produced by modifying a disease-producing (âwildâ) virus or bacteria in a laboratory.