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Lymphatic System

Specific Defenses

What are the two forms of immunity?

Immunity may be either innate or acquired. Innate immunity is present at birth and has no basis to prior exposure to the antigen involved. Certain innate immunity is species-specific. For example, humans are not susceptible to diseases of cats and dogs. Additionally, certain individuals are not susceptible to some diseases that other individuals are susceptible to. Acquired immunity is not present at birth, but rather is acquired following exposure to a particular antigen.



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