A-LevelBiologyImmunity9700/12 · May/June 2014 · Q371 Mark
An antiserum to a snake toxin can be obtained by injecting the toxin into a horse. The antiserum is made from blood plasma taken from the horse a few weeks later. The antiserum is injected into a person who has been bitten by the same species of snake. Which type of immunity occurs as a result of using this antiserum?
Aartificial active
Bartificial passive
Cnatural active
Dnatural passive
✓ Correct answer
B: artificial passive
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