A passive immunity acquired by means of injection of serum containing antibodies to an individual who may have been infected with a particular pathogen.
Passive immunity is typically short lived (compared to active immunity). It may be naturally acquired or artificially acquired.
Since this type of artificial immunity is only temporary, it requires the repeated administration of serum containing the antibodies. This type of immunity is not commonly practiced because of the risk that could lead to kidney failure from such repeated administration of complex proteins.
Compare: natural passive immunity
See also: passive immunity