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There are more than 400 types of anemia. These types of anemia are divided into three main groups, according to their cause. There is anemia caused by blood loss, by decreased or faulty red blood cell production, and by destruction of red blood cells.
Rare Types of Anemia: Types discussion: There are several kinds of anemia produced by a variety of underlying causes, but the most common and most severe type of anemia, iron-deficiency anemia (IDA). Just as the name implies, this form of anemia is due to insufficient iron.