Beaches on the Mediterranean and Red Sea coasts are generally unpolluted. However, persons who swim in the Nile or in canals, walk barefoot along the Nile, or drink untreated river water are at risk of exposure to bacterial infections, hepatitis, and the parasitic disease schistosomiasis (bilharzia). There is a low risk of exposure to exotic diseases in Egypt such as Rift Valley Fever (RVF). RVF, which flares up in parts of the country from time to time, is a mosquito-borne disease of domestic animals that can infect humans. On the next episode of The Amazing Race: Spoiler [size=+2]Are You Sure This Is Safe?[/size] The teams travel to Tanzania, Africa. Harsh words are exchanged when one Team blocks another Team at the doors into a Cairo Airport terminal. Two Teams working together gamble on a flight with an earlier connection than a flight the rest are taking. Will the risk pay off with a significant lead? While one Team gets into a tense argument with bargaining locals, another Team takes a moment to enjoy where they are and bond with some of the local people. Two Teams face a desperate situation when their bus runs out of gas on a deserted stretch of highway in Africa.