S44 Novel Influenza —Review of the Recent Pandemic of the Novel Influenza (H1N1) — S44-1 Introduction: A review of a novel influenza(H1N1) pandemic in Japan in 2009 S44-2 Basic policy and guideline for prevention of current novel influenza virus A (H1N1) S44-3 Effectiveness and problem of medicines for influenza-treatment S44-4 Vaccine development for novel influenza viruses and the remaining developmental issues S44-5 Pathogenesis of severe influenza and prevention and treatment of advanced disease S44-6 Closing remarks