Gaol, R. L., & Naibaho, J. (2022). An overview of the Knowledge of Level 1 Nurse Students about the 5M Health Protocol in Covid-19 Prevention at STIKes Santa Elisabeth Medan 2022. JURNAL KEPERAWATAN DAN FISIOTERAPI (JKF), 5(1), 21–26. https://doi.org/10.35451/jkf.v5i1.1144