WGU D617 Task 1 – Public Health Issue and System Analysis | 2026 Update with complete solutions.
Student Name
Western Governors University
D617: Public Health Core Functions and Essential Services
Instructor
Date
A. Public Health Issue Identification
A1. Description of the Public Health Issue
The selected public health issue is a measles outbreak in a densely populated urban area
(New York City) among under-vaccinated children.
Measles is a highly contagious viral disease transmitted through respiratory droplets and airborne
spread. Due to its high basic reproduction number (R₀ of 12–18), measles spreads rapidly in
communities with low vaccination coverage. In urban environments with high population
density, the disease can quickly escalate into widespread outbreaks, especially in schools and
childcare settings.
Despite the availability of the Measles, Mumps, and Rubella (MMR) vaccine, outbreaks continue
to occur in communities where vaccination rates fall below the 95% herd immunity threshold.
Vaccine hesitancy, misinformation, and healthcare access barriers contribute to ongoing
vulnerability.
B. Epidemiological Analysis
B1. Incidence and Prevalence
Recent urban outbreaks have demonstrated:
Increased measles incidence in neighborhoods with low vaccination rates
Higher infection rates in children under age 10
Clustering of cases in schools and daycare centers
In densely populated areas such as New York City, population proximity accelerates exposure.
Urban settings with crowded housing and heavy public transportation usage amplify
transmission.
, The epidemiological triangle (host, agent, environment) explains outbreak dynamics:
Agent: Measles virus
Host: Unvaccinated children
Environment: Dense urban living, school exposure, vaccine-hesitant communities
C. Determinants of Health Contributing to
the Issue
Several social determinants contribute to outbreak risk:
1. Economic Stability
Low-income families may face:
Limited healthcare access
Transportation barriers
Lack of insurance
2. Education Access and Quality
Lower health literacy contributes to vaccine misinformation and hesitancy.
3. Healthcare Access and Quality
Some neighborhoods have fewer primary care providers and immunization clinics.
4. Neighborhood and Built Environment
Crowded housing and public transit increase exposure risk.
5. Social and Community Context
Distrust of public health institutions may reduce compliance with vaccination campaigns.
These determinants create concentrated vulnerability in specific urban neighborhoods.
Student Name
Western Governors University
D617: Public Health Core Functions and Essential Services
Instructor
Date
A. Public Health Issue Identification
A1. Description of the Public Health Issue
The selected public health issue is a measles outbreak in a densely populated urban area
(New York City) among under-vaccinated children.
Measles is a highly contagious viral disease transmitted through respiratory droplets and airborne
spread. Due to its high basic reproduction number (R₀ of 12–18), measles spreads rapidly in
communities with low vaccination coverage. In urban environments with high population
density, the disease can quickly escalate into widespread outbreaks, especially in schools and
childcare settings.
Despite the availability of the Measles, Mumps, and Rubella (MMR) vaccine, outbreaks continue
to occur in communities where vaccination rates fall below the 95% herd immunity threshold.
Vaccine hesitancy, misinformation, and healthcare access barriers contribute to ongoing
vulnerability.
B. Epidemiological Analysis
B1. Incidence and Prevalence
Recent urban outbreaks have demonstrated:
Increased measles incidence in neighborhoods with low vaccination rates
Higher infection rates in children under age 10
Clustering of cases in schools and daycare centers
In densely populated areas such as New York City, population proximity accelerates exposure.
Urban settings with crowded housing and heavy public transportation usage amplify
transmission.
, The epidemiological triangle (host, agent, environment) explains outbreak dynamics:
Agent: Measles virus
Host: Unvaccinated children
Environment: Dense urban living, school exposure, vaccine-hesitant communities
C. Determinants of Health Contributing to
the Issue
Several social determinants contribute to outbreak risk:
1. Economic Stability
Low-income families may face:
Limited healthcare access
Transportation barriers
Lack of insurance
2. Education Access and Quality
Lower health literacy contributes to vaccine misinformation and hesitancy.
3. Healthcare Access and Quality
Some neighborhoods have fewer primary care providers and immunization clinics.
4. Neighborhood and Built Environment
Crowded housing and public transit increase exposure risk.
5. Social and Community Context
Distrust of public health institutions may reduce compliance with vaccination campaigns.
These determinants create concentrated vulnerability in specific urban neighborhoods.
