Việt Nam’s COVID vaccine developer stops third phase trial due to volu… stockbot 0 154 2021.12.02 17:46 http://vietnamnews.vn/society/1090227/viet-nams-covid-vaccine-develope… + 14 https://vietnamnews.vn/rss/society.rss + 7 The third phase of clinical trials of Việt Nam's homemade COVID-19 vaccine COVIVAC have been halted, due to a shortage of volunteers.