Social & Preventive Medicine H5N1 Avian influenza has not become an epidemic till now. What is the most important reason for this? A Seen only in wild birds and not in domestic poultry B It has avian influenza genes C Human to human transmission is rare D It causes serious illness leading to death of the patient 💡 Explanation H5N1 Avian influenza has not become an epidemic till now. What is the most important reason for this? ✓ Correct Answer: C. Human to human transmission is rare