<p>The bite of the tsetse fly - a burning sting into the skin - causes a descent into violent fever and aching pains. Severe bouts of insomnia are followed by mental deterioration, disruption of the nervous system, coma and ultimately death.<br>Sleeping sickness, also known as Human African trypanosomiasis, is one of Africa's major killers. It puts 60 million people at risk of infection, occurs in 36 countries in sub-Saharan Africa, and claims th...