Sitepu, F. Y., Depari, E., Aditama, W., Halim, R., Isworo, A., Lumbangaol, B. H. P., Fathan, M. M., Aritonang, F. A., Sihotang, E., Napitupulu, D. P. and Nofri, A. (2020) “A Survey of the Knowledge of Surveillance Officers and Outbreak Investigation Team toward COVID-19 in North Sumatera Province, Indonesia”, Open Access Macedonian Journal of Medical Sciences, 8(T1), pp. 55-60. doi: 10.3889/oamjms.2020.4910.