In Kenya, the tiny tsetse fly is a big problem.  Its bite can transmit sleeping sickness to humans as well as the fatal animal disease Nagana to cattle.  The economic impact can be devastating.  But thanks to an EU-funded trial, farmers in Kenya are fighting back with a revolutionary repellent collar. The new must-have accessory for Kenyan cows that contributes to improve the welfare, food security and general prosperity of poor livestock keepers in Africa was developed by scientists at...