Wanich Rungram, and S. Yangyuen. “Developing a community-based COVID-19 surveillance system for Rural Kalasin, Thailand: 10.55131/jphd/2026/240210”. Journal of Public Health and Development, vol. 24, no. 2, May 2026, pp. 142-57, doi:10.55131/jphd/2026/240210.