Passive immunity refers to the creation of immunity by introducing antibodies from outside the organism, such as the injection of antivenom after having been bitten by a snake.
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Immunity is defined as the set of defenses, that our bodies possess, which has the role to protect us against pathogens and to fight against infections.
By active immunity, we generally understand the resistance that our immune system shows against pathogens.
By the so-called 'clonal selection', enough antibodies are built up in order to help our organism fight off colds or different diseases.
There are several immunity categories:
Among the features of passive immunity, the most known are: