ScienceWhich COVID-19 vaccine is most promising?To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScience07/31/2020July 31, 2020July 2020: Two research teams announced breakthroughs in the search for a coronavirus vaccine. The WHO reported that 22 more vaccine candidates were in clinical trials. An overview of the most important vaccine strategies.https://p.dw.com/p/3gFY8Advertisement