Final answer:
Immunogenicity refers to the ability of a person to produce an immune response. Immunity is the ability to resist infection by a pathogen. Active immunity can result from immunization or prior exposure to pathogens.
Step-by-step explanation:
Immunogenicity refers to the ability of a person to produce an immune response. Immunity is the ability to resist infection by a pathogen. Active immunity results from an immune response to a pathogen and the formation of memory cells. Passive immunity results from the transfer of antibodies to a person who has not been exposed to the pathogen.
Active immunity can also result from immunization, which is the deliberate exposure of a person to a pathogen in order to provoke an immune response and the formation of memory cells specific to that pathogen.
Examples of active immunity include the immunity you likely have against diseases like measles, mumps, and chickenpox due to prior vaccination or previous exposure to the pathogens.