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1. What is an antigen? Give an example​
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1. What is an antigen? Give an example​

User Chris Franklin
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A toxin or foreign substance
User Nikolaj
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A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
An example would be a common cold virus which causes the bodies to make antibodies which prevents the person from getting sick.
User AdamGold
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