Abstract
COVID-19 cases and clusters have been visualized, and the differences between the first and second waves of infected cases were revealed using network graphs. Degree centrality was used to quantify the number of infected cases. The first wave cases were mainly isolated in the home for the elderly, clinic or hospital. On the other hand, for the second wave, clubs/bars were identified as major places of transmission. More sporadic cases were reported in the second than in the first wave.