APHA APHA Special Populations & High-Risk Groups 2 — Questions and Answers
Question 1: Pre-travel immunization counseling for a US traveler to a meningitis belt region in sub-Saharan Africa should prioritize which vaccine?
- MenACWY (quadrivalent meningococcal) (Correct answer)
- MenB (serogroup B meningococcal)
- Hib vaccine
- MMRV combination vaccine
Correct answer: MenACWY (quadrivalent meningococcal)
MenACWY is prioritized for travelers to the African meningitis belt because serogroups A, C, W, and Y predominate in that region.
Question 2: Which vaccine is mandatory for entry into Saudi Arabia during the Hajj and Umrah pilgrimages?
- Yellow fever
- Hepatitis A
- Meningococcal ACWY (Correct answer)
- Typhoid
Correct answer: Meningococcal ACWY
Saudi Arabia requires proof of MenACWY vaccination for all pilgrims traveling for Hajj or Umrah due to historically high risk of meningococcal outbreaks during mass gatherings.
Question 3: Asplenic patients (e.g., post-splenectomy) are at increased risk for serious infections from encapsulated organisms and should receive which vaccines?
- Hepatitis A and B series only
- Influenza, pneumococcal, meningococcal, and Hib vaccines (Correct answer)
- Varicella and MMR boosters
- Tdap and HPV vaccines
Correct answer: Influenza, pneumococcal, meningococcal, and Hib vaccines
Asplenic patients are highly susceptible to overwhelming infections from encapsulated bacteria, requiring influenza, pneumococcal, meningococcal, and Hib vaccines.
Question 4: Which statement best describes vaccination recommendations for healthcare workers (HCWs) regarding hepatitis B?
- HCWs should only be vaccinated if they have occupational needlestick exposure
- HCWs should receive hepatitis B vaccine series and post-vaccination serologic testing to confirm immunity (Correct answer)
- HCWs with natural immunity do not need vaccination under any circumstances
- Post-exposure prophylaxis alone is sufficient; pre-vaccination is optional for HCWs
Correct answer: HCWs should receive hepatitis B vaccine series and post-vaccination serologic testing to confirm immunity
Healthcare workers should complete the hepatitis B vaccine series and undergo post-vaccination serologic testing (anti-HBs ≥10 mIU/mL) to confirm protective immunity before occupational exposure occurs.
Question 5: In patients receiving long-term immunosuppressive therapy (e.g., high-dose corticosteroids), live vaccines should ideally be administered at what time point?
- During active immunosuppressive therapy at reduced dosing
- At least 4 weeks before starting immunosuppressive therapy (Correct answer)
- Immediately after discontinuing immunosuppressive therapy
- Only after CD4 count recovery above 500 cells/µL
Correct answer: At least 4 weeks before starting immunosuppressive therapy
Live vaccines should be given at least 4 weeks before initiating immunosuppressive therapy to allow adequate immune response while the immune system is still intact.
Question 6: For international adoptees arriving from countries with unknown or unreliable vaccination records, the recommended approach is:
- Accept all reported vaccinations as valid and administer only catch-up doses
- Revaccinate with all recommended vaccines regardless of reported history
- Test serologic titers for all vaccine-preventable diseases before giving any vaccines
- Administer vaccines or test for immunity based on the most practical approach for the child's situation (Correct answer)
Correct answer: Administer vaccines or test for immunity based on the most practical approach for the child's situation
ACIP recommends either re-vaccinating or testing serologic titers for internationally adopted children with uncertain records, choosing the most practical approach for the individual situation.
APHA APHA Special Populations & High-Risk Groups 2
Pre-travel immunization counseling for a US traveler to a meningitis belt region in sub-Saharan Africa should prioritize which vaccine?