1. Organization WH. WHO Director-General's opening remarks at the media briefing on COVID-19–11 March 2020 2020 [Available from: https://www.who.int/director-general/speeches/detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid-19---11-march-2020.
2. organization wh. Report of the WHO-China Joint Mission on Coronavirus Disease 2019 (COVID-19) 2019 [Available from: https://www.who.int/publications/i/item/report-of-the-who-china-joint-mission-on-coronavirus-disease-2019-(covid-19).
3. organization wh. Weekly epidemiological update on COVID-19–8 June 2023 2023 [Available from: https://www.who.int/publications/m/item/weekly-epidemiological-update-on-covid-19---8-june-2023.
4. Sustainable medical teaching and learning during the COVID-19 pandemic: surviving the new normal;Yusoff MSB;Malaysian J Med sciences: MJMS,2020
5. Wang C, Cheng Z, Yue X-G, McAleer M. Risk management of COVID-19 by universities in China. MDPI; 2020. p. 36.