There are many things to fear in Tanzania besides Ebola. These include malaria, typhoid fever, food poisoning and traffic accidents. In two of the largest cities in the country, driving--or walking--is very dangerous.
It only takes a short break in concentration for the unthinkable to happen. Fact of the matter is, if you're not paying 100 percent attention to the road, you are gambling with your life and the lives of others.