I have been working on Tropical Medicine, particularly on arthropod-borne viral diseases that include dengue fever. My research covers from the molecular to the operational levels in disease control and I am assisting global tropical disease programs as a head of the WHO Collaborating Centre on Tropical and Emerging Viral Diseases. In the past, our research group developed a West Nile virus candidate vaccine. And now, I am willing to contribute to develop a vaccine for dengue fever, which is the most important mosquito-borne virus infection in the world.