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

Passive immunity

Answer

Herd immunity

Answer

Innate immunity

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

They directly neutralize pathogens before immune response begins

Answer

They reduce the concentration of antigen needed per dose

Answer

They extend the shelf life of vaccine formulations

Question 3

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

Accepted Answer

Prevnar 20 (PCV20)

Answer

PPSV23

Answer

MMR

Answer

Varivax

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 require no refrigeration, while inactivated vaccines need ultra-cold storage

Answer

mRNA vaccines integrate into the host genome, while inactivated vaccines do not

Answer

mRNA vaccines provide lifelong immunity, while inactivated vaccines do not

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

The initial vaccine was ineffective and a new formulation is needed

Answer

Boosters replace live virus that degrades within the body

Answer

Tetanus toxin mutates rapidly, requiring updated vaccine formulations

Question 6

Which component of the influenza vaccine is responsible for the annual reformulation?

Accepted Answer

Hemagglutinin (HA) and neuraminidase (NA) antigens

Answer

Aluminum adjuvant concentration

Answer

Preservative thimerosal content

Answer

Egg-based growth medium