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Pathogen.

Pathogens can be things like viruses or bacteria which have things called antigens on them. These antigens are proteins on the pathogen that let the body know that the pathogen is potentially dangerous. This induces the immune response.

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11y ago
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Wiki User

14y ago

An antigen is any sub

stance the white blood cells recognize as foreign.

That is straight out of my college health text book.

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AnswerBot

1mo ago

antigen.

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12y ago

antigen

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Q: Any substance that the white blood cells recognize as foreign is known as an?
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