2.2. Types of survey
In epidemiology, there are two broad types of pathogen surveillance systems. Although they are often treated together in summaries and reviews, they are in fact radically different in purpose, strategy, methods and implications. Here we discuss these briefly as they apply to honey bee virus surveillance. For more detail information on how to manage these different approaches, see the BEEBOOK papers on epidemiology (vanEngelsdorp et al., 2013) and surveys (van der Zee et al., 2013).