APHA Immunization Pharmacology & Vaccine Science

Question 1

Which type of immunity is produced after vaccination with a live attenuated vaccine?

Accepted Answer

Active immunity

Answer

Live attenuated vaccines stimulate active immunity by triggering the immune system to produce its own antibodies and memory cells.

Question 2

What is the primary mechanism by which adjuvants in vaccines enhance immune response?

Accepted Answer

They stimulate innate immune responses and promote antigen-presenting cell activation

Answer

Adjuvants enhance vaccine immunogenicity by stimulating innate immunity and activating antigen-presenting cells, leading to a stronger adaptive response.

Question 3

Which of the following vaccines contains a polysaccharide conjugated to a carrier protein?

Accepted Answer

Prevnar 20 (PCV20)

Answer

Prevnar 20 (PCV20) is a conjugate vaccine where polysaccharides are chemically linked to a carrier protein to enhance T-cell–dependent immune responses.

Question 4

What is the key difference between mRNA vaccines and traditional inactivated vaccines?

Accepted Answer

mRNA vaccines instruct cells to produce a viral protein, while inactivated vaccines contain killed pathogen

Answer

mRNA vaccines deliver genetic instructions for cells to produce a target protein (e.g., spike protein), while inactivated vaccines use killed whole pathogens to stimulate immunity.

Question 5

A patient asks why they need a booster dose for their tetanus vaccine. What is the best pharmacological explanation?

Accepted Answer

Antibody titers wane over time and a booster restores protective immunity

Answer

Antibody levels decline over years after initial immunization, so booster doses are required to re-stimulate memory B cells and restore protective antibody titers.

(APHA) APhA Pharmacy-Based Immunization Certificate Practice Test

(APHA) APhA Pharmacy-Based Immunization Certificate Practice Test

APHA Immunization Pharmacology & Vaccine Science