An International Observational Study to Characterize Adults Who Are Hospitalized with Complications of Influenza A Pandemic (H1N1v).

A Phase III International, Randomized, Double-blind, Double-dummy Study to Evaluate the Efficacy and Safety of 300 mg or 600 mg of Intravenous Zanamivir Twice Daily Compared to 75 mg of Oral Oseltamivir Twice Daily in the Treatment of Hospitalized Adults and Adolescents With Influenza.(ZORO)