19/06/2015 GMT

In this month's Health Check - Claudia Hammond and Ayan Panja are looking at some of the neglected tropical diseases which kill around the world. Tsetse flies which spread sleeping sickness can't resist a very particular shade of blue - which helps scientists to stop the insects in their tracks. There's a mass vaccination of dogs in Malawi against the killer disease rabies - and the hidden dangers of raw fish in Thailand.