Social & Preventive Medicine Which of the following lead to an outbreak of Influenza in China in 2013 – A H 1 N 1 B H 3 N 2 C H 2 N 2 D H 7 N 9 💡 Explanation Which of the following lead to an outbreak of Influenza in China in 2013 - ✓ Correct Answer: D. H 7 N 9