<unk> , also called autologous vaccines, autovaccines, “self” or custom vaccines, are vaccines that are prepared by isolation and destruction of microorganisms in infected individuals and used to provide immunity to the same individual.<unk>  were introduced in the early twentieth century with growing evidence of its efficacy against certain infections. These vaccines rely on the activation of the individual's immune system to produce immunity against the infectious pathogen. They are usually produced when an individual or small group is presented with a disease and can be applied to various bacterial and viral infections.<unk>  are quite similar to conventional vaccines in terms of their use, however, they are dissimilar and arguably preferred over conventional vaccines in certain areas. Currently, several<unk>  are available for veterinary use in several countries. Human use of this type of vaccine is limited and has not been widely approved due to lack of scientific evidence and research.
Autogenous vaccines
Synthetic vaccine
Therapeutic vaccines
Genetically modified vaccine
Conjugate vaccine
Cell-based vaccine
Animal vaccination
Vaccine