Boonrumpai, Krittinan, Chawisar Janekrongtham, Pichaya Sonthiporn, Orathai Suwanchairob, Prangsiri Nalam, Chonlada Siri, Wanich Rungram, Phanthanee Thitichai, and Thanit Rattanathumsakul. “An Investigation of a SARS-CoV-2 Omicron Variant Cluster Linked to Nightclubs, Kalasin Province, Thailand, December 2021”. Outbreak, Surveillance, Investigation & Response (OSIR) Journal 16, no. 4 (December 30, 2023): 208–216. accessed October 2, 2026. https://he02.tci-thaijo.org/index.php/OSIR/article/view/263662.