Moderna booster a half-dose of the same vaccine used in first two shot… stockbot 0 68 2022.01.24 18:31 http://vietnamnews.vn/society/1119120/moderna-booster-a-half-dose-of-t… + 5 https://vietnamnews.vn/rss/society.rss + 5 The Moderna booster jab will be a half-dose of the same vaccine used in the first two full shots as recommended by the producer, the Drug Administration of Việt Nam under the Heath Ministry announced on Friday.