It is particularly prevalent in tropical and sub-tropical regions of the world and kills an African child every 30 seconds , according to the World Health Organization . Scientists are developing a laser that could kill millions of mosquitoes in minutes . Score: 6 Around one million people die of malaria each year , according to the WHO .
Scientists are developing a laser that could kill millions of mosquitoes in minutes . Score: 6 Around one million people die of malaria each year , according to the WHO .