ATI Pharm: The Immune System Exam|100% Correct
Answers | Verified | Latest 2026|1-200 Practice Questions with
Detailed Rationales
.
SECTION 1: FUNDAMENTALS OF IMMUNITY & VACCINES
Question 1:
A nurse is teaching a client about the difference between active and passive immunity.
Which statement by the client indicates understanding?
A) "Active immunity is temporary and acquired through the placenta."
B) "Passive immunity involves the body producing its own antibodies."
C) "Active immunity results from the body producing its own antibodies after exposure
to an antigen."
D) "Passive immunity is long-lasting and involves memory cell formation."
Correct Answer: C) "Active immunity results from the body producing its own
antibodies after exposure to an antigen."
Rationale: Active immunity occurs when the body is exposed to an antigen and produces
its own antibodies, resulting in long-term protection with memory cell formation. Passive
immunity (A, B) involves receiving pre-formed antibodies from another source and
provides temporary protection without memory cell formation.
,Question 2:
A nurse is preparing to administer the measles, mumps, and rubella (MMR) vaccine to a
child. The nurse should recognize that the MMR vaccine provides which type of
immunity?
A) Naturally acquired active immunity
B) Artificially acquired active immunity
C) Naturally acquired passive immunity
D) Artificially acquired passive immunity
Correct Answer: B) Artificially acquired active immunity
Rationale: The MMR vaccine contains live-attenuated viruses that stimulate the body's
immune system to produce its own antibodies (active immunity). Because the immunity is
induced through medical intervention (vaccination) rather than natural infection, it is
considered artificially acquired active immunity .
Question 3:
A parent asks the nurse why their child needs multiple doses of the same vaccine. What
is the nurse's best response?
A) "Each dose contains a different strain of the virus to provide broader protection."
B) "Multiple injections ensure that an adequate number of B cells become sensitized to
the antigen and begin making antibodies."
C) "The first dose is a test dose, and subsequent doses are boosters only."
D) "Multiple doses are required because the vaccine is not effective in children under
12."
Correct Answer: B) "Multiple injections ensure that an adequate number of B cells
become sensitized to the antigen and begin making antibodies."
Rationale: Multiple doses of a vaccine are needed to ensure that enough B cells become
sensitized to the antigen and begin producing antibodies. Booster shots with smaller doses
of the original antigen are also required to maintain protection over time .
,Question 4:
A nurse is teaching a client about recommended immunizations. Which immunization
should the nurse recommend the client receive starting at 50 years of age?
A) Influenza vaccine
B) Pneumococcal vaccine
C) Herpes zoster vaccine
D) Tdap vaccine
Correct Answer: C) Herpes zoster vaccine
Rationale: The herpes zoster (shingles) vaccine is recommended for adults starting at age
50. Influenza vaccine is recommended annually for all adults. Pneumococcal vaccine
recommendations are based on age and risk factors. Tdap is recommended for adults who
have not previously received it .
Question 5:
A nurse is teaching a guardian about the recommended age range to receive the human
papillomavirus (HPV) vaccine. Which age range should the nurse include?
A) 7 to 9 years old
B) 9 to 12 years old
C) 11 to 12 years old
D) 13 to 15 years old
Correct Answer: C) 11 to 12 years old
Rationale: The CDC recommends routine HPV vaccination for all children at age 11 or 12
years. The vaccination series can be started as early as age 9 .
Question 6:
, A nurse is caring for a client who asks, "Why do I need to get the flu shot every year?"
Which response is most accurate?
A) "The flu virus mutates frequently, requiring updated vaccines each year."
B) "Your immunity from the previous year's vaccine only lasts 6 months."
C) "Each year's vaccine contains a higher dose than the previous year."
D) "The vaccine becomes less effective with age and requires annual boosting."
Correct Answer: A) "The flu virus mutates frequently, requiring updated vaccines
each year."
Rationale: The influenza virus undergoes frequent antigenic changes (drift and shift),
requiring annual reformulation of the vaccine to match circulating strains. The body's
immunity from previous vaccines may not protect against new strains.
SECTION 2: IMMUNOSUPPRESSANTS & TRANSPLANT
MEDICATIONS
Question 7:
A nurse is caring for a client who has a new prescription for tacrolimus following a
kidney transplant. Which laboratory value should the nurse monitor most closely?
A) Serum potassium
B) Serum creatinine
C) White blood cell count
D) Serum sodium
Correct Answer: B) Serum creatinine
Rationale: Tacrolimus is a calcineurin inhibitor that is nephrotoxic. Serum creatinine
should be monitored closely to assess renal function and detect early signs of
nephrotoxicity. Therapeutic drug monitoring of tacrolimus trough levels is also essential.
Answers | Verified | Latest 2026|1-200 Practice Questions with
Detailed Rationales
.
SECTION 1: FUNDAMENTALS OF IMMUNITY & VACCINES
Question 1:
A nurse is teaching a client about the difference between active and passive immunity.
Which statement by the client indicates understanding?
A) "Active immunity is temporary and acquired through the placenta."
B) "Passive immunity involves the body producing its own antibodies."
C) "Active immunity results from the body producing its own antibodies after exposure
to an antigen."
D) "Passive immunity is long-lasting and involves memory cell formation."
Correct Answer: C) "Active immunity results from the body producing its own
antibodies after exposure to an antigen."
Rationale: Active immunity occurs when the body is exposed to an antigen and produces
its own antibodies, resulting in long-term protection with memory cell formation. Passive
immunity (A, B) involves receiving pre-formed antibodies from another source and
provides temporary protection without memory cell formation.
,Question 2:
A nurse is preparing to administer the measles, mumps, and rubella (MMR) vaccine to a
child. The nurse should recognize that the MMR vaccine provides which type of
immunity?
A) Naturally acquired active immunity
B) Artificially acquired active immunity
C) Naturally acquired passive immunity
D) Artificially acquired passive immunity
Correct Answer: B) Artificially acquired active immunity
Rationale: The MMR vaccine contains live-attenuated viruses that stimulate the body's
immune system to produce its own antibodies (active immunity). Because the immunity is
induced through medical intervention (vaccination) rather than natural infection, it is
considered artificially acquired active immunity .
Question 3:
A parent asks the nurse why their child needs multiple doses of the same vaccine. What
is the nurse's best response?
A) "Each dose contains a different strain of the virus to provide broader protection."
B) "Multiple injections ensure that an adequate number of B cells become sensitized to
the antigen and begin making antibodies."
C) "The first dose is a test dose, and subsequent doses are boosters only."
D) "Multiple doses are required because the vaccine is not effective in children under
12."
Correct Answer: B) "Multiple injections ensure that an adequate number of B cells
become sensitized to the antigen and begin making antibodies."
Rationale: Multiple doses of a vaccine are needed to ensure that enough B cells become
sensitized to the antigen and begin producing antibodies. Booster shots with smaller doses
of the original antigen are also required to maintain protection over time .
,Question 4:
A nurse is teaching a client about recommended immunizations. Which immunization
should the nurse recommend the client receive starting at 50 years of age?
A) Influenza vaccine
B) Pneumococcal vaccine
C) Herpes zoster vaccine
D) Tdap vaccine
Correct Answer: C) Herpes zoster vaccine
Rationale: The herpes zoster (shingles) vaccine is recommended for adults starting at age
50. Influenza vaccine is recommended annually for all adults. Pneumococcal vaccine
recommendations are based on age and risk factors. Tdap is recommended for adults who
have not previously received it .
Question 5:
A nurse is teaching a guardian about the recommended age range to receive the human
papillomavirus (HPV) vaccine. Which age range should the nurse include?
A) 7 to 9 years old
B) 9 to 12 years old
C) 11 to 12 years old
D) 13 to 15 years old
Correct Answer: C) 11 to 12 years old
Rationale: The CDC recommends routine HPV vaccination for all children at age 11 or 12
years. The vaccination series can be started as early as age 9 .
Question 6:
, A nurse is caring for a client who asks, "Why do I need to get the flu shot every year?"
Which response is most accurate?
A) "The flu virus mutates frequently, requiring updated vaccines each year."
B) "Your immunity from the previous year's vaccine only lasts 6 months."
C) "Each year's vaccine contains a higher dose than the previous year."
D) "The vaccine becomes less effective with age and requires annual boosting."
Correct Answer: A) "The flu virus mutates frequently, requiring updated vaccines
each year."
Rationale: The influenza virus undergoes frequent antigenic changes (drift and shift),
requiring annual reformulation of the vaccine to match circulating strains. The body's
immunity from previous vaccines may not protect against new strains.
SECTION 2: IMMUNOSUPPRESSANTS & TRANSPLANT
MEDICATIONS
Question 7:
A nurse is caring for a client who has a new prescription for tacrolimus following a
kidney transplant. Which laboratory value should the nurse monitor most closely?
A) Serum potassium
B) Serum creatinine
C) White blood cell count
D) Serum sodium
Correct Answer: B) Serum creatinine
Rationale: Tacrolimus is a calcineurin inhibitor that is nephrotoxic. Serum creatinine
should be monitored closely to assess renal function and detect early signs of
nephrotoxicity. Therapeutic drug monitoring of tacrolimus trough levels is also essential.
