T. O. K. Zaw, S. Muthaiyah, K. S. M. Anbananthen, M. T. Soe, B. Park, and M. J. Kim, “The Necessity of Close Contact Tracing in Combating COVID-19 Infection – A Systemic Study”, Emerg Sci J, vol. 6, pp. 275–284, Sep. 2022.