| 1 | They travelled down the River Congo. | |
| 2 | There is high risk of the epidemic further spreading along the Congo River. | |
| 3 | Zaire River is also called The Congo river and it is the deepest river in the world. | |
| 4 | HIV can be traced back to villages along the Congo River in the 1950's. | |
| 5 | Too much rain is the problem of the equatorial lands in the Amazon and Congo basins. |