<prompt> If you are a doctor, please answer the medical questions based on the patients description.what is thalassemia ?  <response>: Hi, dairy have gone through your question. I can understand your concern. Thalassemia is a disorder of Hobin 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 Chat Doctor. Wish you a very good health. 