http://www.who.int/influenza/resources/documents/h5n1_assessing_pandemic_threat/en/

This publication evaluates the present pandemic threat on the basis of what we know about pandemics, influenza A viruses, and the H5N1 virus in particular. It draws together some current facts and figures, evidence from the past, and some best-guess speculations useful in assessing the present situation and understanding its multiple implications for human health. Basic information on human cases detected to date is set out in tabular form. Document on PDF format, Acrobat Reader required.