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Difficulty: HardImmunizations and Vaccine-Preventable Diseases

Match each patient scenario involving a special population with the most appropriate next step in their immunization management.

  • A 28-year-old pregnant woman at 30 weeks gestation who received a Tdap vaccine 18 months ago during a previous pregnancy.Administer the Tdap vaccine, as it is indicated in every pregnancy regardless of prior vaccination intervals.
  • A 34-year-old man with untreated HIV (CD4 count 130 cells/mm³) who requires pre-travel clearance for a trip to a yellow fever endemic region.Advise that the requested vaccine is contraindicated due to severe immunosuppression and provide a medical waiver letter.
  • A 52-year-old man initiating hemodialysis who recently received PCV20; his serology shows HBsAg negative, anti-HBs negative, and anti-HBc negative.Administer the Hepatitis B vaccine series and perform post-vaccination serologic testing 1 to 2 months after completion.
  • A 68-year-old man with chronic obstructive pulmonary disease who received a dose of PPSV23 at age 61 and a dose of PCV15 one year ago at age 67.Administer a second dose of the 23-valent pneumococcal polysaccharide vaccine (PPSV23).
  • A 21-year-old man with sickle cell disease who completed his primary meningococcal vaccination series and received his last MenACWY booster at age 16.Administer a booster dose of the quadrivalent meningococcal conjugate vaccine (MenACWY).

Answer

The correct matches are: the pregnant patient receives Tdap; the HIV patient receives a medical waiver for yellow fever; the hemodialysis patient receives the Hepatitis B series with post-vaccination testing; the COPD patient receives a second PPSV23 dose; and the sickle cell patient receives a MenACWY booster.
Each patient represents a special population with strict guidelines: pregnant women universally require Tdap; severely immunosuppressed patients (CD4 < 200) cannot receive live vaccines (yellow fever); hemodialysis patients need HepB series with confirmed serology; adults >65 with prior PPSV23 need a second dose after proper intervals; and asplenic patients need MenACWY boosters every 5 years.

Step-by-Step Solution

1
Evaluate the vaccination needs of the pregnant patient.
Identify that Tdap is required.
Tdap is recommended during every pregnancy between 27 and 36 weeks gestation to provide passive neonatal immunity, regardless of previous vaccination history.
2
Assess the HIV patient's pre-travel requirements.
Identify that yellow fever vaccine is contraindicated.
The patient has a CD4 count < 200 cells/mm³, which is an absolute contraindication for live-attenuated vaccines due to the risk of disseminated infection.
3
Determine the optimal management for the hemodialysis patient.
Identify the need for Hepatitis B vaccination and follow-up serology.
Hemodialysis patients are a high-risk population with blunted immune responses, requiring confirmation of anti-HBs titers after completing the vaccine series.
4
Determine the next pneumococcal vaccine for the COPD patient.
Identify that a second dose of PPSV23 is indicated.
He is over 65, more than 5 years have elapsed since his pre-65 PPSV23 dose, and it has been at least 1 year since his PCV15 dose.
5
Review the meningococcal booster schedule for the sickle cell patient.
Identify that a MenACWY booster is due.
Patients with functional asplenia require MenACWY boosters every 5 years throughout their life.

Key Concept

Immunization management requires tailoring vaccine schedules, intervals, and contraindications to specific high-risk populations, including pregnancy, severe immunosuppression, dialysis, advanced age with comorbidities, and asplenia.
Estimated Time:1m 30s
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Topics

Immunizations and Vaccine-Preventable Diseases

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