Wanich Rungram, Yangyuen S. Developing a community-based COVID-19 surveillance system for Rural Kalasin, Thailand: 10.55131/jphd/2026/240210. J Public Hlth Dev [internet]. 2026 May 8 [cited 2026 Oct. 13];24(2):142-57. available from: https://he01.tci-thaijo.org/index.php/AIHD-MU/article/view/279422