Sripu, C., Monpangtiem, K., Jumpasan, N., Malasri, J. and Unsaeng, C. 2023. An investigation of the COVID-19 cluster in restaurants, Mueang District, Chaiyaphum Province, January, 2022. Journal of the Office of Disease Prevention and Control 9 Nakhon Ratchasima. 29, 3 (Aug. 2023), 80–93.