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Hi Anonymous,

Thank you for your question and welcome to Empowher. Anonymous, can you rephrase your question as I am unsure I understand what you are asking. Sickle cell anemia is a type of anemia so were you asking how many different types of anemia there are? Here is an information cite for you to look at sickle cell traits but if this was not what you were requesting, just respond to this question. http://users.rcn.com/jkimball.ma.ultranet//BiologyPages/S/Sickle-cellDis...

Thanks,

Missie