Srisaeng, S. . (2023) “An investigation of COVID-1 9 outbreak in a superstore at Chiangmai province, October - November 2021”, Phetchabun Medical Journal . Phetchabun, Thailand, 3(2), pp. 174–84. available at: https://he03.tci-thaijo.org/index.php/PMJ/article/view/3013 (accessed: 7 April 2025).