The present disease strategy manual for VER (Version 1) was published in 2004 and requires updating to reflect 10 years of very active local and international research. Considerable new knowledge has been generated about the epidemiology of the disease including: the host range; differences in susceptibility between some species of fish; prevalence of sub-clinical infection in wild fishes and other aquatic organisms. In addition, there has been the development of a new generation of diagnostic tests and potential disease prevention and control methods. Consequently, attitudes and approaches to disease control by government regulators and farm management have evolved.