Praxis 5511 Practice Test Practice Question
The major reason for the preparation of different influenza vaccines each year is that
Correct Answer: D
Rationale: Influenza viruses constantly mutate, leading to the emergence of new strains each year. This variability necessitates the formulation of updated vaccines to effectively target the most prevalent strains.
Option A is incorrect; while some viruses have short lifespans, influenza vaccines are updated due to strain changes rather than the virus's longevity.
Option B is misleading; while antibodies can change, it is the viruses themselves that evolve, not the antibodies.
Option C is not the main reason for annual vaccine updates; although animal viruses can affect humans, the primary concern is the annual variation of influenza strains.
Unlock All Questions
Subscribe to Premium for full access to all practice questions, detailed rationales, and performance tracking.
Subscribe Now