What is the primary aim of rapid response vaccination in outbreak settings?

• A. To document the outbreak for surveillance purposes
• B. To rapidly boost population immunity and interrupt transmission
• C. To vaccinate only children in the outbreak area
• D. To distribute antivirals to infected individuals

Answer: (B)

Rapid response vaccination aims to rapidly boost population immunity and interrupt transmission. In a poliovirus outbreak, time is critical because the virus spreads quickly through close contact and contamination of the environment. By vaccinating as many people as possible in the affected area in a short time, especially those not yet immune, you raise community protection fast enough to break transmission chains and prevent new cases from arising. This approach is about increasing immunity across the population, not just documenting the outbreak or giving antivirals. Vaccination campaigns are designed to achieve high coverage quickly, often using vaccines that elicit strong mucosal immunity to curb intestinal infection and shedding, thereby reducing onward transmission while surveillance and risk communication support the effort.