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.
Concerned your child may have a learning disability? Youâre not alone. Approximately 20% of people are affected by dyslexia, according to the International Dyslexia Association. Additionally, almost 80% of kids who are categorized with learning disabilities in the United States fall somewhere on the dyslexia spectrum. To help parents identify if their children are at risk for a learning disability, we provide free online testing for dyslexia and other learning disabilities.