1. 1. Li Q, Guan X, Wu P, et al. Early transmission dynamics in Wuhan, China, of novel coronavirus-infected pneumonia. N Engl J Med 2020;382(13):1199–1207. DOI: 10.1056/NEJMoa2001316.
2. 2. World Health Organization, Timeline of WHO's response to COVID-19 2020 [Available from: https://www.who.int/news/item/29-06-2020-covidtimeline.
3. 3. World Health Organization, Naming the coronavirus disease (COVID-19) and the virus that causes it 2020 [Available from: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/technical-guidance/naming-the-coronavirus-disease-(covid-2019)-and-the-virus-that-causes-it.
4. 4. World Health Organization, WHO Coronavirus Disease (COVID-19) Dashboard 2020 Available from: https://covid19.who.int.
5. 5. Peng X, Xu X, Li Y, et al. Transmission routes of 2019-nCoV and controls in dental practice. Int J Oral Sci 2020;12(1):9. DOI: 10.1038/s41368-020-0075-9.