HBA2 and cancer: Among the participants, there was a history of thalassemia with a rate of 1.5%, a genetic disease with a rate of 0.9%, a diagnosis of cancer with a rate of 0.6%, a diagnosis of allergic disease with a rate of 3.4%, a diagnosis of chronic disease with a rate of 8.6%, diagnosis of non-β-thalassemia blood disease with a rate of 0.3%, and the presence of conditions associated with high HbA2, with a rate of 3.1% was found (Table-I).