Hi, dear I have gone through your question. I can understand your concern. Thalassemia is a disorder of hlobin chain synthesis. Basically there is defect in hemoglobin production. There are many type like alpha and beta thalassemia. B thalassemia is common. homozygous and heterozygous variant are also there. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using health care magic. Wish you a very good health.