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.
An individual with dyslexia usually has several, not just one or two, of the characteristics listed below. These characteristics usually persist over time and interfere with his or her learning.If your child is having difficulties learning to read and you have noted several of these characteristics in your child, he or she may need to be evaluated for dyslexia and/or a related disorder.Difficulty with oral language.1  Late in learning to talk. 2  Difficulty in pronouncing words.f your child is having difficulties learning to read and you have noted several of these characteristics in your child, he or she may need to be evaluated for dyslexia and/or a related disorder. Difficulty with oral language. 1  Late in learning to talk. 2  Difficulty in pronouncing words.