There are 100 active Covid-19 clusters in Singapore, the Ministry of Health (MOH) announced yesterday. In its nightly update, MOH said a new Covid-19 cluster has emerged at Changi General Hospital. A total of three cases are linked to the cluster. This comes after the ministry said on Saturday that it had closed the previous CGH cluster. That cluster had 20 patients linked to it and was closed as it had no new cases for the past two incubation periods, or 28 days. MOH said another cluster comprising six cases has been linked to construction firm Kian Hiap Construction. The two clusters were among eight new clusters announced yesterday, and were all linked to previous cases.