Author Question: Immunity is a characteristic of the: a. agent factor. b. host factor. c. environmental factor. ... (Read 112 times)

soccerdreamer_17 · **on:** Jul 8, 2018

Immunity is a characteristic of the:

a. agent factor.
b. host factor.
c. environmental factor.
d. epidemiologic triad.

Question 2

During the twentieth century, a nurse participated in research that examined the epidemiology of various diseases. Which of the following best describes the factors that influenced these studies? (Select all that apply.)

a. Increasing rate of poverty
b. Declining child mortality rates
c. Overcrowding in major cities
d. Development of new vaccinations
e. Advancements in medical equipment

C.mcnichol98 · **Reply #1 on:** Jul 8, 2018

Answer to Question 1

ANS: B
Immunity refers to species-determined resistance to an infectious agent and is determined by the characteristics of the host. The agent is the infection that is causing the infection/disease. Envi-ronmental factors may influence the susceptibility of the host. The epidemiologic triad involves the interaction of the host, agent, and environment.

Answer to Question 2

ANS: B, D
Factors contributing to the development and application of epidemiologic methods in the twenti-eth century were: improved nutrition, new vaccines, better sanitation, the advent of antibiotics and chemotherapies, and declining infant and child mortality and birth rates. A rise in the stand-ard of living occurred for many following the Great Depression and World War II. The ad-vancements in medical technology have not influenced the examination of the epidemiology of various diseases.