For Kasun Chameera, who lives in Sri Lanka¡¯s densely populated capital Colombo, dengue fever is a disease which has afflicted many loved ones, including his brother.

¡°We fear death when we hear about dengue,¡± Chameera said. ¡°It¡¯s present almost everywhere in my district, and spreads faster in the city than in the villages.¡±

His brother ¡°suffered a lot from it,¡± Chameera said. ¡°For at least one to two months, he would be tired walking just 10 steps. We were very scared.¡±