Results: Retrospective data on malaria control program between 2015 and 2018 to classify malaria foci showed the following results: In 2018, in Thanh and Xy communes (Quang Tri), there were 8 active focus, 8 residual non-active focus; in Ea Lam, Ea Ly commnunes (Phu Yen), there were 4 active focus, 3 residual non-active focus, 4 cleared focus.