KHAIRULBAHRI, M. . (2021). Understanding the First and the Second Waves of the COVID-19 in Germany: Is our Social Behavior Enough to Protect us from the Pandemic?. Walailak Journal of Science and Technology (WJST), 18(15), Article 22203 (11 pages). https://doi.org/10.48048/wjst.2021.22203