A homologous booster shot involves the administration of the same vaccine as previously administered, while a<unk>  booster shot involves the administration of a different vaccine.<unk>  prime-boost immunization is administration of two different vectors or delivery systems expressing the same or overlapping antigenic inserts." "An effective vaccine usually requires more than one time immunization in the form of prime-boost. Traditionally the same vaccines are given multiple times as homologous boosts. New findings suggested that prime-boost can be done with different types of vaccines containing the same antigens. In many cases such<unk>  prime-boost can be more immunogenic than homologous prime-boost."
Heterologous vaccine
Attenuated vaccine
Conjugate vaccine
Synthetic vaccine
Subunit vaccine
Inactivated vaccine
Genetically modified vaccine
Plant expressed vaccine