1. World Health Organization (WHO, 2020a). (https://www.who.int/emergencies/diseases/novel-coronavirus-2019/situation-reports/). June 15, 2020.
2. Cai, J., Sun, W., Huang, J., Gamber, M., Wu, J., & He, G. (2020). Indirect virus transmission in cluster of COVID-19cases, Wenzhou, China, 2020.
3. Real-time estimation and prediction of mortality caused by COVID-19 with patient information based algorithm;Wang;Sci Total Environ,2020
4. Worldometer (2020): https://www.worldometers.info/coronavirus/)retrieved on June 15, 2020.
5. CDC (2020). Coronavirus (COVID019). https://www.cdc.gov/coronavirus/2019-ncov/index.html. Accessed June 15, 2020.