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Table 1 Search process of the literature on de-escalation strategies of non-pharmaceutical interventions following an infectious disease outbreak

From: De-escalation strategies for non-pharmaceutical interventions following infectious disease outbreaks: a rapid review and a proposed dynamic de-escalation framework

1. Grey literature searches to include unindexed sources of information from institutional websites such as the US Centers for Disease Control and Prevention (CDC), the European Centre for Disease Prevention and Control (ECDC) and WHO [25]
2. Advanced searching techniques such as citation tracking and reference harvesting from key documents
3. Searches in the specialist COVID-19 source LitCovid [26]
4. Searches in Embase.com (which includes Embase and Medline) bibliographic database (covering the biomedical, public health and disaster literature) on April 8th 2020 and Scopus
5. Review of the list of rapid reviews prepared externally for WHO (unpublished, updated April 9th 2020)
6. The University of Oxford Coronavirus Government Response Tracker [27]