Objective:To investigate the distribution of α-& β-thalassemia in Chongqing. Methods:Totally 8 024 samples from district and counties of Chongqing were detected for α-& β-thalassemia genotype using gap single polymerase chain reaction(GSPCR)combined with reverse dot blot hybridization(RDB). Before the detection,red peripheral blood cell(RBC),hemoglobin(HB),mean corpuscular volume(MCV),mean corpuscular hemoglobin(MCH),mean corpuscular hemoglobin concentration(MCHC),hemoglobin electrophoresis index in each se...