Immunity by vaccine is-
.vaccine is an immunobiological substance designed to produce specific protection against a given disease.it stimulates the production of protctive antibody and other immune mechanisms.it can be prepared from live modified organisms,inactivated or killed organisms,extracted cellular fractions,toxoids,or combination of these.hence vaccines induces active acquired immunity. ref:park&;s textbook,22 nd ed,pg 99
Active natural
Passive natural
Active acquired
Passive acquired
Epidemiology