Thunboonyakid S, Sukchan P, Sangsri T. A A retrospective study on the effectiveness of active surveillance, control and prevention of the outbreak of COVID-19 in rural communities, Ron Phibun District Nakhon Si Thammarat Province. Pnu Sci J [internet]. 2023 May 15 [cited 2026 Aug. 28];15(2):225-42. available from: https://li01.tci-thaijo.org/index.php/pnujr/article/view/255133