Warning: file_get_contents(https://ojs.journalbusiness.my/ojs.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /var/www/ojs.unud.ac.id_backup/lib/pkp/includes/functions.inc.php on line 4 PARAMASATIARI, A.A.A.L.; WIDHIDEWI, N.W.. PENERAPAN PROTOKOL KESEHATAN BAGI SISWA SEKOLAH DALAM MENCEGAH PENULARAN COVID-19. Buletin Udayana Mengabdi, [S.l.], v. 24, n. 1, p. 19-24, jan. 2024. ISSN 2654-9964. Tersedia pada: <https://ojs.unud.ac.id/index.php/jum/article/view/79682>. Tanggal Akses: 29 aug. 2026 doi: https://doi.org/10.24843/BUM.2025.v24.i01.p04.