Which of the following is NOT a core element of a public health surveillance system during disasters?

• A. Data sources
• B. Real-time reporting
• C. Privacy protections
• D. Routine annual census updates

Answer: (D)

In disaster surveillance, timely, actionable information is essential for rapid decision-making and response. A surveillance system relies on multiple data sources to detect emerging health events quickly, real-time reporting so that authorities can see evolving trends as they happen, and strong privacy protections to maintain trust and comply with legal and ethical standards when handling sensitive information. Routine annual census updates, while useful for long-term demographic planning, are not timely enough to inform disaster response, and they don’t provide the rapid, event-focused data needed to track outbreaks, injuries, resource needs, or access issues in real time.