Incubation period of swine flu-: (A) 1-3 days, (B) 2-3 weeks, (C) 10-15 days, (D) 5 weeks
Answer is A. (ref:Park's text book 23rd edition) Incubation period of swine flu is 2 - 3 days. It is caused by pandemic influenza A (H1N1) It can infect Lower respiratory tract and causes rapidly progressive pneumonia.