Vaccination is Active Acquired Immunity. An antigen is introduced into the body. These antigens provoke production of memory lymphocytes. Toxoids are preparations made from weakened toxins produced by bacteria.
New vaccines use genetic engineering techniques.
Influenza for those over 65 or with chronic diseases. Rabies for veterinarians and animal handlers. Anthrax for those who handle imported animal hides, wool, hair. Women should consult with a physician about which vaccines they can have if they suspect they are pregnant. In some people, the body makes antibodies to harmless substances such as pollen and animal dander.