<P> The one exception to passive humoral immunity is the passive transfer of cell - mediated immunity, also called adoptive immunization which involves the transfer of mature circulating lymphocytes . It is rarely used in humans, and requires histocompatible (matched) donors, which are often difficult to find, and carries severe risks of graft - versus - host disease . This technique has been used in humans to treat certain diseases including some types of cancer and immunodeficiency . However, this specialized form of passive immunity is most often used in a laboratory setting in the field of immunology, to transfer immunity between "congenic", or deliberately inbred mouse strains which are histocompatible . </P> <P> An individual's immune response of passive immunity is "faster than a vaccine" and can instill immunity in an individual that does not "respond to immunization", often within hours or a few days . Another advantage to passive immunity is that maternal antibodies that are passed to the newborn during nursing boosts the newborn's immune system having lasting effects on the baby's health such as decreased risk of obesity . </P> <P> A disadvantage to passive immunity is that producing antibodies in a laboratory is expensive and difficult to do . In order to produce antibodies for infectious diseases, there is a need for possibly thousands of human donors to donate blood or immune animals' blood would be obtained for the antibodies . Patients who are immunized with the antibodies from animals may develop serum sickness due to the proteins from the immune animal and develop serious allergic reactions . Antibody treatments can be time consuming and are given through an intravenous injection or IV, while a vaccine shot or jab is less time consuming and has less risk of complication than an antibody treatment . Passive immunity is effective, but ephemeral (lasting a short amount of time). </P>

Which is an example of acquired passive immunity quizlet