Wanich Rungram, and Suneerat Yangyuen. 2026. “Developing a community-based COVID-19 surveillance system for Rural Kalasin, Thailand: 10.55131/jphd/2026/240210”. Journal of Public Health and Development 24 (2). Bangkok, Thailand:142-57. https://doi.org/10.55131/jphd/2026/240210.