During an outbreak, rapid response vaccination campaigns are designed to

• A. Boost population immunity quickly to stop transmission
• B. Only vaccinate individuals with known exposure
• C. Replace all routine immunization activities
• D. Identify asymptomatic carriers for isolation

Answer: (A)

Rapidly increasing immunity in the whole community is the goal of outbreak vaccination campaigns because it quickly interrupts viral transmission. Polio spreads even when most cases are without symptoms, and many people may be unvaccinated or under-vaccinated. By vaccinating a large portion of the population in a short time, the number of susceptible individuals drops, transmission chains are broken, and the outbreak is controlled more quickly. This approach complements routine immunization rather than replacing it, and it focuses on broad protection rather than targeting only those with known exposure. Isolating asymptomatic carriers isn’t practical for polio, since many infections never cause symptoms, so vaccination to raise herd immunity is the most effective strategy.