1. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China;Huang;The Lancet,2020
2. Worldmeter. COVID-19 CORONAVIRUS PANDEMIC. Available from: https://www.worldometers.info/coronavirus/.Accessed 5 May, 2020.
3. A familial cluster of pneumonia associated with the 2019 novel coronavirus indicating person-to-person transmission: a study of a family cluster;Chan;Lancet,2020
4. WHO. How does COVID-19 spread?]. Available from: https://www.who.int/news-room/q-a-detail/q-a-coronaviruses. Accessed 5 May, 2020.
5. Health, E.M.o.; COVID - 19 status in Egypt]. Available from: https://www.care.gov.eg/EgyptCare/Index.aspx. Accessed 5 May, 2020.