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If the immunodeficient defect is present at birth and is therefore a result of a genetic or developmental abnormality, it is called a primary immunodeficiency.

If the immunodeficient defect is present at birth and is therefore a result of a genetic or developmental abnormality, it is called a primary immunodeficiency.

Secondary immunodeficiency, sometimes called aquired immunodeficiency, is the loss of immune function during life, caused by exposure to harmful agents.

Secondary immunodeficiency, sometimes called acquired immunodeficiency, is the loss of immune function during life, caused by exposure to harmful agents.

Immunodeficiencies can be treated by the replacement of the defective or missing protein, cells or gene. However, in veterinary medicine, [[Vaccines - WikiBlood|vaccinations]] and drugs are the most common treatments for immunodeficiency.

Immunodeficiencies can be treated by the replacement of the defective or missing protein, cells or gene. However, in veterinary medicine, [[Vaccines - WikiBlood|vaccinations]] and drugs are the most common treatments for immunodeficiency.