Because of its potential public health implications, the following Original Article and its accompanying Perspective article have been published early on the web. They will appear in the March 18, 2004, issue of the Journal

Original Article: Avian Influenza A (H5N1) in 10 Patients in VietnamT.T. Hien and Others

Perspective: Crossing the Species Barrier -- One Small Step to Man,One Giant Leap to Mankind M.S. Klempner and D.S. Shapiro