Vietnamese researchers in the US invent COVID-19 vaccine patches and r… stockbot 0 416 2021.01.27 18:23 http://vietnamnews.vn/society/862804/vietnamese-researchers-in-the-us-… + 59 https://vietnamnews.vn/rss/society.rss + 30 A group of Vietnamese researchers at the University of Connecticut in the US have invented COVID-19 high-tech biological face masks and patches to deliver vaccines into the human body easily.