1. Return of the coronavirus: 2019-nCoV;LE Gralinski;Viruses,2020
2. World Health Organization. Coronavirus disease (COVID-19) advice for the public. 29 Apr 2020 [cited 20 Jun 2020]. https://www.who.int/emergencies/diseases/novel-coronavirus-2019/advice-for-public
3. World Health Organization. Mental health and COVID-19. Apr 2020 [cited 20 Jun 2020]. https://www.who.int/teams/mental-health-and-substance-use/covid-19
4. Fear and Practice Modifications among Dentists to Combat Novel Coronavirus Disease (COVID-19) Outbreak;MA Ahmed;Int J Environ Res Public Health,2020
5. UNESCO IESALC. COVID-19 and higher education: Today and tomorrow. Impact analysis, policy responses and recommendations. 9 Apr 2020 [cited 20 Jun 2020]. http://www.iesalc.unesco.org/en/wp-content/uploads/2020/04/COVID-19-EN-090420-2.pdf