immunity to a particular disease that is not innate but has been acquired during life; immunity can be acquired by the development of antibodies after an attack of an infectious disease or by a pregnant mother passing antibodies through the placenta to a fetus or by vaccination

law: grant immunity from prosecution

months. 2. □ immunity from or against ar- rest protection against being arrested O

A preparation from the cowpox virus that protects against smallpox when administered to an individual, The virus of vaccinia used in vaccination, immunology A substance given to stimulate the body's production of antibodies and provide immunity against a disease, prepared from the agent that causes the disease, or a synthetic substitute