APHA IMMUNIZATION CERTIFICATE TRAINING EXAM
2026/2027 Academic Year
American Public Health Association / APhA Pharmacy-Based Immunization Delivery
70 Multiple-Choice Questions | 90 Minutes | Passing Score: 70-75%
100% Verified | Graded A+
, APHA Immunization Certificate Training Exam
EXAM INSTRUCTIONS
1. This examination consists of 70 multiple-choice questions covering ten domains of immunization
practice.
2. You have 90 minutes to complete the exam. A passing score of 70-75% is required for certification.
3. Each question has four answer options (A through D). Select the single best answer for each question.
4. Questions are organized by content domain. Domain labels appear below each question number for
reference.
5. The correct answer and a detailed clinical rationale are provided immediately after each question for
study purposes.
6. An answer key and domain distribution summary are provided at the end of the document.
7. This exam is based on current ACIP recommendations, CDC guidelines, and APhA Pharmacy-Based
Immunization Delivery program content.
8. All content has been verified for clinical accuracy as of the 2026-2027 academic year.
EXAMINATION QUESTIONS
Question 1 — Vaccine-Preventable Diseases & Epidemiology
Which strain of influenza is NOT included in the standard quadrivalent seasonal influenza
vaccine?
A) Influenza A (H1N1)
B) Influenza A (H3N2)
C) Influenza B (Yamagata lineage)
D) Influenza C
Correct Answer: D — Influenza C
Rationale: Seasonal quadrivalent influenza vaccines contain two influenza A strains (H1N1 and H3N2)
and two influenza B strains (Victoria and Yamagata lineages). Influenza C is not included because it
typically causes only mild respiratory illness and is not a major target of seasonal vaccination
programs. Recent discussions have also considered removing the Yamagata lineage since it has not
circulated since 2020.
Question 2 — Vaccine-Preventable Diseases & Epidemiology
What is the primary mode of transmission for hepatitis B virus (HBV)?
A) Fecal-oral route
B) Percutaneous or mucosal exposure to infectious blood or body fluids
C) Respiratory droplets
D) Vector-borne transmission via mosquito
Correct Answer: B — Percutaneous or mucosal exposure to infectious blood or body fluids
Rationale: Hepatitis B is transmitted primarily through percutaneous or mucosal exposure to infected
blood or body fluids. Common routes include perinatal transmission from mother to child, sexual
contact, sharing of needles, and needlestick injuries in healthcare settings. Fecal-oral transmission is
characteristic of hepatitis A and E, not hepatitis B.
Question 3 — Vaccine-Preventable Diseases & Epidemiology
Which serogroup of Neisseria meningitidis is most commonly associated with outbreaks in
the United States and is included in the MenACWY vaccine?
A) Serogroup B
B) Serogroup C
C) Serogroup Y
D) Serogroup A
Correct Answer: C — Serogroup Y
Rationale: In the United States, serogroups B, C, and Y are the most common causes of meningococcal
disease, with serogroup Y accounting for a significant proportion of cases, particularly among older
adults. The MenACWY vaccine covers serogroups A, C, W, and Y. A separate MenB vaccine is required
for protection against serogroup B disease. Serogroup A is more prevalent in the African meningitis belt.
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, APHA Immunization Certificate Training Exam
Question 4 — Vaccine-Preventable Diseases & Epidemiology
The incubation period for varicella (chickenpox) is typically:
A) 1 to 3 days
B) 5 to 7 days
C) 14 to 16 days (range 10 to 21 days)
D) 30 to 45 days
Correct Answer: C — 14 to 16 days (range 10 to 21 days)
Rationale: The typical incubation period for varicella-zoster virus (VZV) is 14 to 16 days, with a range
of 10 to 21 days. After exposure, the rash appears following this incubation period. This knowledge is
important for post-exposure prophylaxis decisions, as varicella vaccine can be effective if given within 3
to 5 days of exposure, and VariZIG must be given within 10 days of exposure.
Question 5 — Vaccine-Preventable Diseases & Epidemiology
Herd immunity against measles requires a vaccination coverage rate of approximately:
A) 70%
B) 80%
C) 95%
D) 50%
Correct Answer: C — 95%
Rationale: Measles is one of the most contagious infectious diseases, with a basic reproduction number
(R0) of 12 to 18, meaning each infected person can infect 12 to 18 susceptible individuals. Because of this
high transmissibility, approximately 95% of the population must be immune to achieve herd immunity.
This is why even small declines in vaccination coverage can lead to outbreaks, emphasizing the critical
importance of maintaining high immunization rates.
Question 6 — Vaccine-Preventable Diseases & Epidemiology
Which of the following is a serious complication associated with pertussis infection in
infants?
A) Hepatomegaly
B) Apnea and pneumonia
C) Nephrotic syndrome
D) Cardiomyopathy
Correct Answer: B — Apnea and pneumonia
Rationale: Infants, particularly those under 12 months of age, are at highest risk for severe pertussis
complications including apnea (life-threatening pauses in breathing), pneumonia, seizures,
encephalopathy, and death. This is why the Tdap vaccine is recommended during each pregnancy
(between 27 and 36 weeks gestation) to provide passive immunity to the newborn through
transplacental antibody transfer.
Question 7 — Vaccine-Preventable Diseases & Epidemiology
Which pneumococcal vaccine is recommended as the primary vaccine for adults 65 years
and older who have not previously received a pneumococcal conjugate vaccine?
A) PPSV23 (Pneumovax 23) alone
B) PCV15 followed by PPSV23
C) PCV20 alone
D) PCV13 alone
Correct Answer: C — PCV20 alone
Rationale: Under current ACIP recommendations (2022 and beyond), PCV20 alone is an option for
adults 65 years and older who have not received a pneumococcal conjugate vaccine previously. PCV20
covers 20 serotypes and provides comprehensive protection in a single dose, eliminating the need for a
sequential PPSV23 dose. Alternatively, PCV15 followed by PPSV23 at least one year later is also
acceptable.
Question 8 — Vaccine-Preventable Diseases & Epidemiology
Recombinant zoster vaccine (RZV, Shingrix) is recommended for which of the following
populations?
A) Adults 50 years and older, including those with a prior history of herpes zoster
3
2026/2027 Academic Year
American Public Health Association / APhA Pharmacy-Based Immunization Delivery
70 Multiple-Choice Questions | 90 Minutes | Passing Score: 70-75%
100% Verified | Graded A+
, APHA Immunization Certificate Training Exam
EXAM INSTRUCTIONS
1. This examination consists of 70 multiple-choice questions covering ten domains of immunization
practice.
2. You have 90 minutes to complete the exam. A passing score of 70-75% is required for certification.
3. Each question has four answer options (A through D). Select the single best answer for each question.
4. Questions are organized by content domain. Domain labels appear below each question number for
reference.
5. The correct answer and a detailed clinical rationale are provided immediately after each question for
study purposes.
6. An answer key and domain distribution summary are provided at the end of the document.
7. This exam is based on current ACIP recommendations, CDC guidelines, and APhA Pharmacy-Based
Immunization Delivery program content.
8. All content has been verified for clinical accuracy as of the 2026-2027 academic year.
EXAMINATION QUESTIONS
Question 1 — Vaccine-Preventable Diseases & Epidemiology
Which strain of influenza is NOT included in the standard quadrivalent seasonal influenza
vaccine?
A) Influenza A (H1N1)
B) Influenza A (H3N2)
C) Influenza B (Yamagata lineage)
D) Influenza C
Correct Answer: D — Influenza C
Rationale: Seasonal quadrivalent influenza vaccines contain two influenza A strains (H1N1 and H3N2)
and two influenza B strains (Victoria and Yamagata lineages). Influenza C is not included because it
typically causes only mild respiratory illness and is not a major target of seasonal vaccination
programs. Recent discussions have also considered removing the Yamagata lineage since it has not
circulated since 2020.
Question 2 — Vaccine-Preventable Diseases & Epidemiology
What is the primary mode of transmission for hepatitis B virus (HBV)?
A) Fecal-oral route
B) Percutaneous or mucosal exposure to infectious blood or body fluids
C) Respiratory droplets
D) Vector-borne transmission via mosquito
Correct Answer: B — Percutaneous or mucosal exposure to infectious blood or body fluids
Rationale: Hepatitis B is transmitted primarily through percutaneous or mucosal exposure to infected
blood or body fluids. Common routes include perinatal transmission from mother to child, sexual
contact, sharing of needles, and needlestick injuries in healthcare settings. Fecal-oral transmission is
characteristic of hepatitis A and E, not hepatitis B.
Question 3 — Vaccine-Preventable Diseases & Epidemiology
Which serogroup of Neisseria meningitidis is most commonly associated with outbreaks in
the United States and is included in the MenACWY vaccine?
A) Serogroup B
B) Serogroup C
C) Serogroup Y
D) Serogroup A
Correct Answer: C — Serogroup Y
Rationale: In the United States, serogroups B, C, and Y are the most common causes of meningococcal
disease, with serogroup Y accounting for a significant proportion of cases, particularly among older
adults. The MenACWY vaccine covers serogroups A, C, W, and Y. A separate MenB vaccine is required
for protection against serogroup B disease. Serogroup A is more prevalent in the African meningitis belt.
2
, APHA Immunization Certificate Training Exam
Question 4 — Vaccine-Preventable Diseases & Epidemiology
The incubation period for varicella (chickenpox) is typically:
A) 1 to 3 days
B) 5 to 7 days
C) 14 to 16 days (range 10 to 21 days)
D) 30 to 45 days
Correct Answer: C — 14 to 16 days (range 10 to 21 days)
Rationale: The typical incubation period for varicella-zoster virus (VZV) is 14 to 16 days, with a range
of 10 to 21 days. After exposure, the rash appears following this incubation period. This knowledge is
important for post-exposure prophylaxis decisions, as varicella vaccine can be effective if given within 3
to 5 days of exposure, and VariZIG must be given within 10 days of exposure.
Question 5 — Vaccine-Preventable Diseases & Epidemiology
Herd immunity against measles requires a vaccination coverage rate of approximately:
A) 70%
B) 80%
C) 95%
D) 50%
Correct Answer: C — 95%
Rationale: Measles is one of the most contagious infectious diseases, with a basic reproduction number
(R0) of 12 to 18, meaning each infected person can infect 12 to 18 susceptible individuals. Because of this
high transmissibility, approximately 95% of the population must be immune to achieve herd immunity.
This is why even small declines in vaccination coverage can lead to outbreaks, emphasizing the critical
importance of maintaining high immunization rates.
Question 6 — Vaccine-Preventable Diseases & Epidemiology
Which of the following is a serious complication associated with pertussis infection in
infants?
A) Hepatomegaly
B) Apnea and pneumonia
C) Nephrotic syndrome
D) Cardiomyopathy
Correct Answer: B — Apnea and pneumonia
Rationale: Infants, particularly those under 12 months of age, are at highest risk for severe pertussis
complications including apnea (life-threatening pauses in breathing), pneumonia, seizures,
encephalopathy, and death. This is why the Tdap vaccine is recommended during each pregnancy
(between 27 and 36 weeks gestation) to provide passive immunity to the newborn through
transplacental antibody transfer.
Question 7 — Vaccine-Preventable Diseases & Epidemiology
Which pneumococcal vaccine is recommended as the primary vaccine for adults 65 years
and older who have not previously received a pneumococcal conjugate vaccine?
A) PPSV23 (Pneumovax 23) alone
B) PCV15 followed by PPSV23
C) PCV20 alone
D) PCV13 alone
Correct Answer: C — PCV20 alone
Rationale: Under current ACIP recommendations (2022 and beyond), PCV20 alone is an option for
adults 65 years and older who have not received a pneumococcal conjugate vaccine previously. PCV20
covers 20 serotypes and provides comprehensive protection in a single dose, eliminating the need for a
sequential PPSV23 dose. Alternatively, PCV15 followed by PPSV23 at least one year later is also
acceptable.
Question 8 — Vaccine-Preventable Diseases & Epidemiology
Recombinant zoster vaccine (RZV, Shingrix) is recommended for which of the following
populations?
A) Adults 50 years and older, including those with a prior history of herpes zoster
3
