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 learning disorder characterized primarily by difficulty reading. Affecting up to 20% of people in the United States, with millions more likely undiagnosed, dyslexia has to do with how the brain works and is not caused by poor education, intelligence, or vision.he good thing is that although dyslexia is a lifelong issue, it can be treated and alleviated once it has been diagnosed. While the primary symptom is delay or difficulty in the ability to read, there are in fact number of ways to recognize dyslexia in pre-school children, school-aged children, and adults.