The ABO system consists of A, B, AB, and O blood types. People with type A have antibodies in the blood against type B. People with type B have antibodies in the blood against type A. People with AB have no anti-A or anti-B antibodies.
Developmental dyslexia, or specific reading disability, is a disorder in which children with normal intelligence and sensory abilities show learning deficits for reading.
Dyslexia is a specific learning disability (SLD), which is diagnosed in the schools. We have this same issue in Michigan where I am. Even though the word dyslexia is listed under the rule for SLD in the Michigan Administrative Rules for Special Education, school personnel say they do not diagnose it.