A review of the metrics for One Health benefits.

One Health as a concept has been with us for many years, yet it is only recently that it is actively being discussed as a way of mitigating risks in society. Initiatives in the use of this concept require methods to monitor the benefits gained from an holistic approach to health, yet there is an absence of adequate frameworks to measure One Health benefits. This paper explores the problem with a review of the available literature and an examination of methods used. It concludes that most published work on One Health describes how this concept is valuable without trying to estimate the size of benefit or type of value. A framework for measuring the advantages of a One Health approach is needed and, through the process of an international workshop and the development of a One Health business case, the authors are working towards its development.