CRAC 2.3. Surveillance methods/strategy This section describes the developed "collection strategy" (collection strategy in this context means, e.g. active or passive surveillance). It also describes the collection instruments (survey, data extraction methods etc.) and collection units (e.g. individuals, herds, food batch etc.). It may overlap with the surveillance variables specification described in section 2.2 (Variable specifications) One-Health Consensus Reference Annotation Checklist (OH-CRAC)