IB History Exam Prep

Answer - C - Tsetse flies infect both humans and animals with a brutal sleeping sickness.

Key Takeaway: The tsetse fly transmits sleeping sickness, also known as Congo trypanosomiasis. This disease is considered an endemic in some regions of Sub-Saharan Africa. It covers more than 35 countries and has affected more than 60 million people. Currently, estimates say that upwards of 50,000 to 70,000 people are affected. Since 1896, four major epidemics have occurred, the latest in 2008. When the disease is contracted, symptoms typically begin with a severe headache, fever, and joint pain.