Evolutionary Adaptations in H5N1 Influenza: Implications for Human Health and Surveillance StrategiesPrasanta Raghab Mohapatra, MD, FAMS, FRCP(London), FRCP (Glasg), FACP(USA), FCCP(USA), FIDSA(USA), ATSF(USA), Dean (Academic) and Professor & Head of Pulmonary Medicine & Critical Care,