Confidence votes 86.8K. TB is a communicable disease. A communicable disease is a disease that can be passed on in one way or another from a Carrier of the disease to some one else. and is usually the result of a virus or bacterial infection.
The Mississippi is one of the worldâs great rivers. It spans 3,860 miles (6,210 km) of length as measured using its northernmost west fork, the Missouri River, which starts in the Rocky Mountains in Montana, joining the Mississippi proper in the state of Missouri.
By 1940, the locks and dams from Minneapolis down to Alton, Illinois, were in place and operational. The only challenge to navigation left on the upper Mississippi River was a series of rock ledges and shelves that extended for 17 miles on the north-east side of Saint Louis.