Malaria kills more than half a million people per year. We meet the innovators who are using buildings, lights, genes and vaccines to fight the mosquito-borne disease. In Ghana, a young woman has turned her school project into a business, selling lights that electrocute mosquitos and help kids study. In Tanzania, researchers have designed a house with porous walls that diffuse human breath and keep the people inside hidden from mosquitos. In London, scientists are using genetic engineering to reduce female mosquito fertility, aiming one day to make a dent in the wild population. And in Kenya and Malawi, a new malaria vaccine is being tested, offering hope to millions of people. Presenter: Jo Mathys Reporter: Rumella Dasgupta Image: A Star Home (Credit: Star Homes Project)