Why do people with A blood type Have B Antibodies?

Subject: Why do people with A blood type Have B Antibodies?

Date: Thu Apr 3 13:51:42 1997
Posted by Karlis Austrins
Grade level: undergrad
School: Michigan State University
City: East Lansing State/Province: MI
Country: USA
Area of science: Immunology
ID: 860097102.Im

Message:


People with type A blood have Type A antigens, and type B antibodies.  
And vice versa for type B.  How would these people be born with a way of 
recognizing type B blood when they don't have any?  Is this thought to be 
evidance that all humans are related?  I dont believe that humans are 
born with the ability to recognize specific disease antigens, why is blood 
type any different?

Re: Why do people with A blood type Have B Antibodies?

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