In vaccination program planning, what is the primary objective of herd immunity?

In vaccination program planning, what is the primary objective of herd immunity?

• A. Ensure every individual is vaccinated.
• B. Track adverse events.
• C. Achieve vaccination coverage above the herd immunity threshold to interrupt transmission and protect unvaccinated individuals.
• D. Focus on hospital capacity.

Answer: (C)

Herd immunity is achieved when a high enough portion of the population is immune so the disease can no longer spread effectively. The primary objective is to reach vaccination coverage above the herd immunity threshold, which interrupts transmission and protects people who are unvaccinated or cannot be vaccinated. The threshold depends on how contagious the disease is; once the effective reproduction number drops below 1, outbreaks begin to decline. This approach doesn’t require vaccinating everyone, though it aims for broad coverage to shield vulnerable individuals. Safety monitoring and health system planning are important supportive tasks, but the main goal of herd immunity is to stop transmission by achieving sufficient population immunity.

Herd immunity is achieved when a high enough portion of the population is immune so the disease can no longer spread effectively. The primary objective is to reach vaccination coverage above the herd immunity threshold, which interrupts transmission and protects people who are unvaccinated or cannot be vaccinated. The threshold depends on how contagious the disease is; once the effective reproduction number drops below 1, outbreaks begin to decline. This approach doesn’t require vaccinating everyone, though it aims for broad coverage to shield vulnerable individuals. Safety monitoring and health system planning are important supportive tasks, but the main goal of herd immunity is to stop transmission by achieving sufficient population immunity.