Antibodies and Blood types

[prh05a]

Does anyone know why we have antibodies already made against blood types that we haven't been exposed to? For example, why does someone with type A who has never had a transfusion have antibodies to type B? It seems to go against the antigen exposure idea that we have always been taught, but I'm sure there is more going on that I don't know about. Just wondering if anyone knows....

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[DrSnips]

Does anyone know why we have antibodies already made against blood types that we haven't been exposed to? For example, why does someone with type A who has never had a transfusion have antibodies to type B? It seems to go against the antigen exposure idea that we have always been taught, but I'm sure there is more going on that I don't know about. Just wondering if anyone knows....

Cross-reactivity with bacterial antigens. There was another thread just like this.

 

[deleted314957]

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[VisionaryTics]

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