HCMC Christian congregation's Covid cluster 'most dangerous': health minister By Thu Anh June 1, 2021 | 08:30 pm GMT+7 A checkpoint that prevents people from leaving Go Vap District, a major Covid-19 hotspot in HCMC, without presenting necessary papers, June 1, 2021. Photo by VnExpress/Quynh Tran. Health Minister Nguyen Thanh Long said Tuesday that the HCMC Covid-19 cluster at the Revival Ekklesia Mission the "most dangerous" and "the most difficult to control." The cluster’s first infections developed symptoms in mid-May, but it was not until two weeks later that the city confirmed the first three patients after they visited a local hospital. "We have already let the virus spread through four or even five generations in the community without knowing it. And as it spreads exponentially, the situation is now extremely dangerous," said Long.