EPIDEMIOLOGY EXAMINATION QUESTIONS AND
CORRECT ANSWER WITH EXPLANATION GRADED A+
STUDY GUIDE SOOUTHERN NEW HAMPSHIRE
UNIVERSITY
1. Epidemiology is the study of:
A. Distribution and determinants of health-related events in populations
B. Individual cell structure only
C. Weather patterns only
D. Animal behavior only
Answer: A
Rationale: Epidemiology focuses on disease patterns in populations.
2. The basic unit of epidemiology is the:
A. Population
B. Cell
C. Organ
D. Molecule
Answer: A
Rationale: Epidemiology studies groups, not individuals.
3. Incidence refers to:
A. New cases of a disease in a population
B. Total cases at one time
C. Death rate only
D. Recovery rate only
Answer: A
Rationale: Measures new disease occurrence.
4. Prevalence refers to:
A. Total existing cases of a disease
B. New infections only
C. Deaths only
D. Cure rate only
Answer: A
Rationale: Includes old and new cases.
,5. Morbidity refers to:
A. Disease or illness in a population
B. Birth rate only
C. Death rate only
D. Immunity only
Answer: A
Rationale: Refers to sickness.
6. Mortality refers to:
A. Death rate in a population
B. Infection rate only
C. Recovery rate only
D. Birth rate only
Answer: A
Rationale: Measures deaths.
7. Endemic disease is one that is:
A. Constantly present in a population
B. Worldwide outbreak
C. Completely eradicated
D. Randomly disappearing
Answer: A
Rationale: Stable presence in a region.
8. Epidemic refers to:
A. Sudden increase in disease cases
B. No disease presence
C. Genetic mutation only
D. Immune response only
Answer: A
Rationale: Outbreak above expected levels.
9. Pandemic refers to:
A. Global disease outbreak
B. Local infection only
C. Animal disease only
D. Non-infectious disease only
Answer: A
Rationale: Worldwide spread.
, 10. A vector is an organism that:
A. Transmits disease agents
B. Produces antibodies
C. Causes immunity
D. Prevents infection
Answer: A
Rationale: Often insects like mosquitoes.
11. A host is an organism that:
A. Harbors a pathogen
B. Eliminates all pathogens
C. Produces vaccines only
D. Prevents disease always
Answer: A
Rationale: Supports pathogen survival.
12. Reservoir refers to:
A. Natural habitat of pathogens
B. Vaccine storage only
C. Human blood only
D. Oxygen source
Answer: A
Rationale: Where pathogens live and multiply.
13. Chain of infection includes:
A. Six links of disease transmission
B. Only bacteria
C. Only viruses
D. Only fungi
Answer: A
Rationale: Explains disease spread process.
14. The first link in chain of infection is:
A. Infectious agent
B. Portal of exit only
C. Susceptible host only
D. Transmission mode only
Answer: A
Rationale: Pathogen must exist first.
CORRECT ANSWER WITH EXPLANATION GRADED A+
STUDY GUIDE SOOUTHERN NEW HAMPSHIRE
UNIVERSITY
1. Epidemiology is the study of:
A. Distribution and determinants of health-related events in populations
B. Individual cell structure only
C. Weather patterns only
D. Animal behavior only
Answer: A
Rationale: Epidemiology focuses on disease patterns in populations.
2. The basic unit of epidemiology is the:
A. Population
B. Cell
C. Organ
D. Molecule
Answer: A
Rationale: Epidemiology studies groups, not individuals.
3. Incidence refers to:
A. New cases of a disease in a population
B. Total cases at one time
C. Death rate only
D. Recovery rate only
Answer: A
Rationale: Measures new disease occurrence.
4. Prevalence refers to:
A. Total existing cases of a disease
B. New infections only
C. Deaths only
D. Cure rate only
Answer: A
Rationale: Includes old and new cases.
,5. Morbidity refers to:
A. Disease or illness in a population
B. Birth rate only
C. Death rate only
D. Immunity only
Answer: A
Rationale: Refers to sickness.
6. Mortality refers to:
A. Death rate in a population
B. Infection rate only
C. Recovery rate only
D. Birth rate only
Answer: A
Rationale: Measures deaths.
7. Endemic disease is one that is:
A. Constantly present in a population
B. Worldwide outbreak
C. Completely eradicated
D. Randomly disappearing
Answer: A
Rationale: Stable presence in a region.
8. Epidemic refers to:
A. Sudden increase in disease cases
B. No disease presence
C. Genetic mutation only
D. Immune response only
Answer: A
Rationale: Outbreak above expected levels.
9. Pandemic refers to:
A. Global disease outbreak
B. Local infection only
C. Animal disease only
D. Non-infectious disease only
Answer: A
Rationale: Worldwide spread.
, 10. A vector is an organism that:
A. Transmits disease agents
B. Produces antibodies
C. Causes immunity
D. Prevents infection
Answer: A
Rationale: Often insects like mosquitoes.
11. A host is an organism that:
A. Harbors a pathogen
B. Eliminates all pathogens
C. Produces vaccines only
D. Prevents disease always
Answer: A
Rationale: Supports pathogen survival.
12. Reservoir refers to:
A. Natural habitat of pathogens
B. Vaccine storage only
C. Human blood only
D. Oxygen source
Answer: A
Rationale: Where pathogens live and multiply.
13. Chain of infection includes:
A. Six links of disease transmission
B. Only bacteria
C. Only viruses
D. Only fungi
Answer: A
Rationale: Explains disease spread process.
14. The first link in chain of infection is:
A. Infectious agent
B. Portal of exit only
C. Susceptible host only
D. Transmission mode only
Answer: A
Rationale: Pathogen must exist first.
