Q1. In the West Bengal Nipah virus outbreak (2026), how many contacts were traced and what was the observation period used?
A 124 contacts, 14-day observation
B 312 contacts, 28-day observation
C 196 contacts, 21-day observation Correct
D 89 contacts, 30-day observation
Explanation
196 contacts were traced and monitored for 21 days, consistent with Nipah virus's incubation period of 4-21 days. All 196 contacts completed the observation period without developing symptoms, confirming containment.