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Khan Academy
Khan Academy: Human Body Systems: Self vs. Non Self Immunity
Understand the difference between self and non-self immunity. [14:28]
Sophia Learning
Sophia: White Blood Cells: Defense and Immunity: Lesson 1
This lesson will describe how white blood cells play a role in defending our body's defense. It is 1 of 3 in the series titled "White Blood Cells: Defense and Immunity."