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Lecture 12 - Ac# Ac$veimmunity $geninthe ac$...

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3/16/10 1 Ac#ve and Passive Immunity Ac$ve immunity immunity from experience the immune system is exposed to the an$gen in the natural course of life and immune cells respond and ac$vely combat the pathogen Passive immunity occurs when an$bodies are transferred without s$mula$ng the immune system i.e., from mother to infant (through breastmilk) Ac#ve Immunity Trainable The primary advantage of ac$ve immunity comes from the crea$on of memory cells Memory cells produced during the primary response remain in the body for years The secondary response to a par$cular an$gen happens far faster than the first response because the immune system needs to s$mulate and clone only the memory cells Secondary responses also require less energy from the body Ac#ve Immunity Autoimmune Diseases An autoimmune response is an immune response in which the body aEacks itself Autoimmune diseases have different effects depending on what $ssue is under aEack
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