Question

The graph in Figure 14.3 shows the incidence of polio in the United States. The period between 1945 and 1955 indicates?

1) An endemic level.
2) An epidemic level.
3) A sporadic infection.
4) A communicable disease.
5) A pandemic

Answer 1

The period between 1945 and 1955 on the graph indicates an endemic level of polio in the United States.

Step-by-step explanation:

The period between 1945 and 1955 on the graph indicates an endemic level of polio in the United States.

An endemic disease is a disease that is constantly present, usually at low incidence, in a population. In this case, polio was prevalent during this time period in the United States, but the incidence was not at epidemic or pandemic levels.

This information can be inferred from the statement that polio was nearly eliminated around the world and only rarely seen in the United States.