these insects that can breed in a spoonful of stillwater is impossible. this, say experts, is ultimately the best way to ward off the pesky mosquitos and disease, especially before going into a football stadium where the final of the world cup will be held. fans who are planning to travel to the amazon state of manos where there's also malaria may need more than insect repel ant. local health officials highly recommend anyone going there first get a yellow fever vaccination. as for dedgue fever, in june and july the risk is lower in rio but much higher in northeastern cities that host world cup games. all the more reasons for authorities and fans to take precautions. >>> still to come here on this al jazeera news hour, the new hope sparking across nigeria's cocoa fields.