Vaccines which contain tiny amounts of live cells of a particular disease. In healthy people, this is just enough to give them protection against infection. But these vaccines can be dangerous in people having chemotherapy and they should not have them, unless under specialist supervision . Includes vaccines for measles, mumps and rubella (MMR), TB (BCG vaccine), yellow fever, and the oral typhoid vaccine. The polio vaccine, given to most people as children, used to be a live vaccine, but this is no longer used in Australia. The polio vaccine is now made from an inactive form of the virus.