they can be divided into active or passive immunity, and natural or artificial immunity.
in active immunity, energy is expended or used up in creating antibodies. In passive immunity, antibodies are "inherited" or sourced from outside the host's immune system. In a natural immune response, things happen as consequences of day to day living. Artificial immunity refers to us forcing something to take place.
examples:
getting the flu, and recovering is active and natural
immunization is active and artificial
placental transfer is passive and natural
administration of antitoxin is artificial and passive
can you justify the above?
what is the difference between immunization and administration of antitoxin?
what is an antitoxin and in what way does it differ from an antibody?
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