Which statement best describes rapid response vaccination during outbreaks?

• A. To rapidly boost population immunity to interrupt transmission
• B. To vaccinate only previously unvaccinated individuals
• C. To replace routine immunization programs
• D. To treat acutely infected patients with antiviral therapy

Answer: (A)

Rapid response vaccination during outbreaks aims to quickly raise immunity in the population so transmission is interrupted. By rapidly vaccinating a broad portion of people, the number of susceptible individuals falls fast enough to stop transmission chains and protect those who cannot be vaccinated or are at high risk. The goal is speed and wide coverage to achieve herd immunity quickly, giving time to control the outbreak and prevent further cases.

Vaccinating only those who are unvaccinated misses people who had prior vaccination but may have waned protection, and it won’t reliably halt spread. Replacing routine immunization programs isn’t the purpose; outbreak response supplements ongoing routine vaccination rather than replacing it. Treating acutely infected patients with antiviral therapy addresses illness after infection, not prevention of transmission through vaccination.