1. WHO. WHO Director-General’s opening remarks at the media briefing on COVID-19-11, March 2020. World Health Organization. Available from: https://www.who.int/dg/speeches/ detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid-19---11-march-2020.
2. WHO. Non-pharmaceutical public health measures for mitigating the risk and impact of epidemic and pandemic influenza: annex: report of systematic literature reviews. World Health Organization. Available from: https://apps.who.int/iris/handle/10665/329439.
3. WHO. Calibrating long-term non-pharmaceutical interventions for COVID-19: principles and facilitation tools. Manila: WHO Regional Office for the Western Pacific. Available from: https://apps.who. int/iris/handle/10665/332099.
4. WHO. Overview of public health and social measures in the context of COVID-19: interim guidance, 18 May 2020. World Health Organization. Available from: https://apps.who.int/iris/ handle/10665/331773.
5. WHO. Tracking Public Health and Social Measures. A global database of public health and social measures applied during the COVID-19 pandemic. Available from: https://www.who.int/ emergencies/diseases/novel-coronavirus-2019/phsm (2020, accessed 26 July 2020).