A boy suffering from dengue fever receives hydration treatment in April at an air force first-aid camp set up to fight a dengue fever epidemic in Rio de Janeiro, Brazil.
A boy suffering from dengue fever receives hydration treatment in April at an air force first-aid camp set up to fight a dengue fever epidemic in Rio de Janeiro, Brazil. Jack Chang / MCT
A boy suffering from dengue fever receives hydration treatment in April at an air force first-aid camp set up to fight a dengue fever epidemic in Rio de Janeiro, Brazil. Jack Chang / MCT