1. Coronavirus COVID-19 global cases by the center for systems science and engineering.https://gisanddata.maps.arcgis.com/apps/opsdashboard/index.html#/bda7594740fd40299423467b48e9ecf6 Retrieved : 2020-04-02; 2020.
2. Clinical virology;Richman,2016
3. A novel coronavirus outbreak of global health concern;Wang;The Lancet,2020
4. Centers for disease control and prevention: 2019 novel coronavirus.https://www.cdc.gov/coronavirus/2019-ncov Retrieved : 2020-03-10; 2020.
5. Wuhan wet market closes amid pneumonia outbreak. https://www.chinadaily.com.cn/a/202001/01/WS5e0c6a49a310cf3e35581e30.html Retrieved : 2020-03-04; 2019.