Security experts debate prevalence data at AMTSO meeting in Bratislava, Slovakia. Prevalence data can be a great resource for malware researchers, testers, security admins and academics studying the malware ecosystem. But how the data is gathered, compiled and interpreted is a rather involved and difficult process though, with plenty of opportunities for poor methodology choices leading to inaccurate or misleading results. There is a cross-industry IEEE initiative offering a standardised format to facilitate sharing of metadata, operating alongside existing sample-sharing systems.”]
Source: https://nakedsecurity.sophos.com/2013/05/16/how-to-measure-the-biggest-and-most-dangerous-threats/