The study group have also compared the sensitivity of the new RT-PCR process with the Lanciotti' s one by testing on the - 70oC storaged sera including 29 Dengue (+) and 16 Dengue (-), The received results have revealed that the new RT-PCR process could still detect Dengue in 52% of Dengue (+) sera, while the Lanciotti' s one could only detect 14% Dengue among these sera.