A Novel Vaccine Against COVID-19 (VIDEO) Cactus Communications This video is under embargo. Please login to access this video. Caption Early-phase clinical trials show that a vaccine called KCONVAC is safe and stimulates antibody production in Chinese adults. Credit <em>Chinese Medical Journal</em> Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.