1. A novel coronavirus from patients with pneumonia in China;Zhu;N Engl J Med,2019
2. WHO Director-General's opening remarks at the media briefing on COVID-19 - 11 March 2020. https://www.who.int/director-general/speeches/detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid- 19—11-march-2020. Accessed 17 Nov 2020.
3. WHO Coronavirus Disease (COVID-19) Dashboard. https://covid19.who.int/. Accessed 26 September 2020.
4. Organization WH. Covid Strategy Update. 2021.
5. Organisation WH. COVID-19 advice for the public: Getting vaccinated. https://www.who.int/emergencies/diseases/novel-coronavirus-2019/covid-19-vaccines/advice. Published 2021. Accessed2021.