MS Master of Public Health 2

Question 1

What is herd immunity threshold, and what determines it?

Accepted Answer

The proportion of immune individuals needed to prevent epidemic spread, determined by the basic reproduction number R₀

Answer

Herd immunity threshold = 1 - (1/R₀); for measles with R₀ ≈ 15, approximately 93% of the population must be immune to prevent sustained transmission.

Question 2

In public health, what does 'attributable risk percent' (AR%) indicate?

Accepted Answer

The proportion of disease in exposed individuals attributable to the exposure

Answer

AR% = (Risk_exposed - Risk_unexposed) / Risk_exposed × 100, representing what fraction of disease among exposed people is due to the exposure.

Question 3

What is the PRECEDE-PROCEED model used for in health program planning?

Accepted Answer

Systematic assessment and planning framework for health education and promotion programs

Answer

PRECEDE-PROCEED is a comprehensive planning framework that guides assessment of health needs (PRECEDE) and program implementation/evaluation (PROCEED) for health promotion.

Question 4

What is the primary purpose of foodborne illness surveillance systems like FoodNet in the US?

Accepted Answer

Monitor trends in foodborne disease incidence and identify outbreak sources

Answer

FoodNet (Foodborne Diseases Active Surveillance Network) tracks the incidence of laboratory-confirmed foodborne illnesses to monitor trends, identify outbreaks, and evaluate prevention measures.

Question 5

In occupational health, what does the hierarchy of controls prioritize as the most effective measure?

Accepted Answer

Elimination of the hazard at the source

Answer

The hierarchy of controls ranks hazard elimination as most effective because it removes the hazard entirely, followed by substitution, engineering controls, administrative controls, and PPE.

MS - Master of Science Practice Test

MS - Master of Science Practice Test

MS Master of Public Health 2