Aeterna shares rise on potential COVID-19 vaccine exclusive license agreement Aeterna Zentaris (AEZS +17.4%) has exercised its option and has entered into an exclusive worldwide sub-licensable patent and know-how license agreement for a potential COVID-19 vaccine currently in preclinical development that was invented at the Julius-Maximilians-University Wuerzburg, one of Germany’s leading research and teaching universities. #Investment