Given the number of children born in 12 months prior to 01/4/2019 in Vietnam, which was 1,394,401 births according to the Completed results of the 2019 Vietnam population and housing census, these frequencies would translate into 603, 1070, 56,193 and 49,418 babies born with Hb Bart's hydrops, Hb H disease, α-thalassemia trait and α-thalassemia silent, respectively, if no action is taken24. The gene discussed is GSTM1; the disease is thalassemia.