Social & Preventive Medicine A pandemic of H1N1 is suspected when? A Cases occur within 2 weeks period B Cases are spread over 5 or more cities C At least one or more laboratory confirmed H1N1 case D 25 or more people are affected 💡 Explanation A pandemic of H1N1 is suspected when? ✓ Correct Answer: B. Cases are spread over 5 or more cities