HSC4010
Epidemiology & Disease Control
Midterm Assessment Review
(With Solutions)
2026
1
,1. Case: A nurse investigates a foodborne outbreak in a community.
Several patients developed symptoms after eating at the same
restaurant.
Question: Which epidemiological study design is most appropriate?
- A. Case-control study
- B. Cross-sectional study
- C. Cohort study
- D. Randomized controlled trial
Answer: A. Case-control study
Rationale: Compares those who ate at the restaurant (cases) with those
who did not (controls).
---
2. Case: A hospital reports 20 new cases of influenza in one week.
Question: Which measure best describes this?
- A. Prevalence
- B. Incidence
- C. Mortality rate
- D. Case fatality rate
Answer: B. Incidence
Rationale: Incidence measures new cases over time.
---
3. Case: A nurse tracks the number of patients living with HIV in a city.
Question: Which measure is being calculated?
- A. Prevalence
- B. Incidence
- C. Mortality
- D. Attack rate
Answer: A. Prevalence
Rationale: Prevalence measures existing cases at a given time.
2
, ---
4. Case: A patient develops tuberculosis after exposure to a roommate
with active TB.
Question: Which epidemiological concept applies?
- A. Reservoir
- B. Vector
- C. Host susceptibility
- D. Herd immunity
Answer: C. Host susceptibility
Rationale: Individual susceptibility determines disease development.
---
5. Case: A nurse implements vaccination programs to prevent measles
outbreaks.
Question: Which principle is applied?
- A. Herd immunity
- B. Vector control
- C. Quarantine
- D. Case finding
Answer: A. Herd immunity
Rationale: Vaccination protects the community by reducing
transmission.
---
6. Case: A community experiences a sudden increase in cholera cases
after flooding.
Question: Which type of epidemic is this?
- A. Common source
- B. Propagated epidemic
- C. Pandemic
- D. Sporadic outbreak
3
Epidemiology & Disease Control
Midterm Assessment Review
(With Solutions)
2026
1
,1. Case: A nurse investigates a foodborne outbreak in a community.
Several patients developed symptoms after eating at the same
restaurant.
Question: Which epidemiological study design is most appropriate?
- A. Case-control study
- B. Cross-sectional study
- C. Cohort study
- D. Randomized controlled trial
Answer: A. Case-control study
Rationale: Compares those who ate at the restaurant (cases) with those
who did not (controls).
---
2. Case: A hospital reports 20 new cases of influenza in one week.
Question: Which measure best describes this?
- A. Prevalence
- B. Incidence
- C. Mortality rate
- D. Case fatality rate
Answer: B. Incidence
Rationale: Incidence measures new cases over time.
---
3. Case: A nurse tracks the number of patients living with HIV in a city.
Question: Which measure is being calculated?
- A. Prevalence
- B. Incidence
- C. Mortality
- D. Attack rate
Answer: A. Prevalence
Rationale: Prevalence measures existing cases at a given time.
2
, ---
4. Case: A patient develops tuberculosis after exposure to a roommate
with active TB.
Question: Which epidemiological concept applies?
- A. Reservoir
- B. Vector
- C. Host susceptibility
- D. Herd immunity
Answer: C. Host susceptibility
Rationale: Individual susceptibility determines disease development.
---
5. Case: A nurse implements vaccination programs to prevent measles
outbreaks.
Question: Which principle is applied?
- A. Herd immunity
- B. Vector control
- C. Quarantine
- D. Case finding
Answer: A. Herd immunity
Rationale: Vaccination protects the community by reducing
transmission.
---
6. Case: A community experiences a sudden increase in cholera cases
after flooding.
Question: Which type of epidemic is this?
- A. Common source
- B. Propagated epidemic
- C. Pandemic
- D. Sporadic outbreak
3
