passive immunizations การใช้

At the prenatal and neonatal stages of life, the presence of antibodies is provided by passive immunization from the mother.
Passive immunization is direct introduction of these elements into the body, instead of production of these elements by the body itself.
Adoptive T-cell therapy is a form of passive immunization by the transfusion of T-cells ( adoptive cell transfer ).
Artificial passive immunization is normally administered by injection and is used if there has been a recent outbreak of a particular disease or as an emergency treatment for toxicity, as in for tetanus.
It is not certain whether they are natural antibodies ( being produced without any previous infection, vaccination, other foreign antigen exposure or passive immunization ) or are caused by infection in early life.