Tübingen, Germany–based CureVac N.V. (Nasdaq:CVAC) and its partner GSK (NYSE:GSK) have announced positive preclinical data about their second-generation COVID-19 vaccine candidate that combines mRNAs for the beta and delta variants. The companies conducted the preclinical research in conjunction with the Friedrich-Loeffler-Institut, Germany. The research pitted the bivalent candidate against monovalent COVID-19 vaccine candidates. The bivalent…