HCM City on high alert following cases without known sources of infect… stockbot 0 368 2021.05.21 23:39 http://vietnamnews.vn/society/953644/hcm-city-on-high-alert-following-… + 18 https://vietnamnews.vn/rss/society.rss + 4 HCM City authorities have warned all agencies and residents to be on high alert to prevent the spread of COVID-19 as the virus is “already in the community”, following recent domestically transmitted cases without known sources of infection.