1
ATI RN Community Health Proctored Exam
2025/2026 | Actual Exam Questions with
Verified Answers & Rationales | CMS
Predictor | Pass Guarantee
Section 1 – Epidemiology & Disease Surveillance (Items 1-15)
1. A PHN reviews weekly STI surveillance. Which finding best confirms an outbreak of
syphilis?
A. 15 cases in 1 week versus 5-case baseline
B. 15 cases in 1 week versus 5-case baseline with epidemiologic linkage
C. 15 cases in 4 weeks versus 5-case baseline
D. 15 cases in 4 weeks with no linkage
Answer: B – Outbreak definition requires ≥ expected cases plus epidemiologic linkage
(time/place/person).
2. Attack rate calculation is most useful for:
A. Determining years of potential life lost
B. Comparing risk among exposed groups (correct)
C. Estimating disability-adjusted life years
D. Projecting health-care costs
3. A county reports 12 tuberculosis cases/100 000 in 2025; national rate 2.5/100 000.
Standardized mortality ratio (SMR) if 3 deaths occur among these 12 is:
A. 0.25
B. 1.2
C. 12
D. Cannot calculate from data given (need expected deaths)
4. Which best demonstrates “secondary attack rate”?
A. Influenza A cases in household contacts (correct)
B. COVID-19 ICU admissions
C. Measles vaccine efficacy
D. HPV prevalence in women 21-26 yr
, 2
5. A PHN uses the “epi-curve” to evaluate a salmonella outbreak. The curve shows a single
peak over 6 days; this suggests:
A. Person-to-person transmission
B. Common point source
C. Intermittent source
D. Secondary spread
6. (R) Case-fatality rate is expressed as:
A. # deaths/# population at mid-year
B. # deaths/# cases of disease × multiplier (correct)
C. # cases/# exposed
D. # deaths/# births
7. A nurse interviews the first mumps case in a community. This activity is:
A. Active surveillance
B. Sentinel surveillance
C. Case investigation (correct)
D. Syndromic surveillance
8. Which data source is nationally notifiable but not required to be reported within 24 h?
A. Anthrax
B. Botulism
C. Lyme disease (correct)
D. Plague
9. A school district reports 30% varicella vaccination exemption. The expected herd -
immunity threshold is 92%. The nurse’s priority action:
A. Exclude unvaccinated children
B. Implement remote learning
C. Promote catch-up clinics & exemption education (correct)
D. Quarantine entire school
10. A PHN analyzes YPLL-75 for opioid deaths. This measure best highlights:
A. Economic cost to health system
B. Premature mortality impact (correct)
C. Years lived with disability
D. Case fatality
, 3
11. Chain of infection link most amenable to nurse-driven intervention in influenza outbreak:
A. Portal of entry
B. Mode of transmission (correct)
C. Reservoir
D. Infectious agent
12. A refugee camp has 4000 persons; 60 develop measles, 12 die. Case-fatality rate:
A. 1.5%
B. 20%
C. 3%
D. 0.3%
13. Which surveillance method best captures mild COVID-19 infections in the community?
A. Hospital discharge data
B. Wastewater testing (correct)
C. Death certificates
D. School absentee logs
14. A nurse notes incidence ↑ but prevalence stable for hepatitis A. Best explanation:
A. Improved treatment
B. Short disease duration/high recovery (correct)
C. Vaccine failure
D. Immigration influx
15. The “web of causation” model is most useful to:
A. Calculate relative risk
B. Identify multifactorial determinants (correct)
C. Establish legal causation
D. Compute disability weights
Section 2 – Community Assessment & Health Planning (Items 16-30)
16. First step in the community assessment according to PHN Intervention Wheel:
A. Collect demographic statistics
B. Define the community (boundaries/people) (correct)
C. Identify key informants
D. Prioritize problems
ATI RN Community Health Proctored Exam
2025/2026 | Actual Exam Questions with
Verified Answers & Rationales | CMS
Predictor | Pass Guarantee
Section 1 – Epidemiology & Disease Surveillance (Items 1-15)
1. A PHN reviews weekly STI surveillance. Which finding best confirms an outbreak of
syphilis?
A. 15 cases in 1 week versus 5-case baseline
B. 15 cases in 1 week versus 5-case baseline with epidemiologic linkage
C. 15 cases in 4 weeks versus 5-case baseline
D. 15 cases in 4 weeks with no linkage
Answer: B – Outbreak definition requires ≥ expected cases plus epidemiologic linkage
(time/place/person).
2. Attack rate calculation is most useful for:
A. Determining years of potential life lost
B. Comparing risk among exposed groups (correct)
C. Estimating disability-adjusted life years
D. Projecting health-care costs
3. A county reports 12 tuberculosis cases/100 000 in 2025; national rate 2.5/100 000.
Standardized mortality ratio (SMR) if 3 deaths occur among these 12 is:
A. 0.25
B. 1.2
C. 12
D. Cannot calculate from data given (need expected deaths)
4. Which best demonstrates “secondary attack rate”?
A. Influenza A cases in household contacts (correct)
B. COVID-19 ICU admissions
C. Measles vaccine efficacy
D. HPV prevalence in women 21-26 yr
, 2
5. A PHN uses the “epi-curve” to evaluate a salmonella outbreak. The curve shows a single
peak over 6 days; this suggests:
A. Person-to-person transmission
B. Common point source
C. Intermittent source
D. Secondary spread
6. (R) Case-fatality rate is expressed as:
A. # deaths/# population at mid-year
B. # deaths/# cases of disease × multiplier (correct)
C. # cases/# exposed
D. # deaths/# births
7. A nurse interviews the first mumps case in a community. This activity is:
A. Active surveillance
B. Sentinel surveillance
C. Case investigation (correct)
D. Syndromic surveillance
8. Which data source is nationally notifiable but not required to be reported within 24 h?
A. Anthrax
B. Botulism
C. Lyme disease (correct)
D. Plague
9. A school district reports 30% varicella vaccination exemption. The expected herd -
immunity threshold is 92%. The nurse’s priority action:
A. Exclude unvaccinated children
B. Implement remote learning
C. Promote catch-up clinics & exemption education (correct)
D. Quarantine entire school
10. A PHN analyzes YPLL-75 for opioid deaths. This measure best highlights:
A. Economic cost to health system
B. Premature mortality impact (correct)
C. Years lived with disability
D. Case fatality
, 3
11. Chain of infection link most amenable to nurse-driven intervention in influenza outbreak:
A. Portal of entry
B. Mode of transmission (correct)
C. Reservoir
D. Infectious agent
12. A refugee camp has 4000 persons; 60 develop measles, 12 die. Case-fatality rate:
A. 1.5%
B. 20%
C. 3%
D. 0.3%
13. Which surveillance method best captures mild COVID-19 infections in the community?
A. Hospital discharge data
B. Wastewater testing (correct)
C. Death certificates
D. School absentee logs
14. A nurse notes incidence ↑ but prevalence stable for hepatitis A. Best explanation:
A. Improved treatment
B. Short disease duration/high recovery (correct)
C. Vaccine failure
D. Immigration influx
15. The “web of causation” model is most useful to:
A. Calculate relative risk
B. Identify multifactorial determinants (correct)
C. Establish legal causation
D. Compute disability weights
Section 2 – Community Assessment & Health Planning (Items 16-30)
16. First step in the community assessment according to PHN Intervention Wheel:
A. Collect demographic statistics
B. Define the community (boundaries/people) (correct)
C. Identify key informants
D. Prioritize problems
