Lilianti, Hasmi, and Yacob Ruru. 2021. “Evaluation of the Covid-19 Surveillance System in Jayapura City, 2020”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 56 (2):190-211. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/12442.