Since early 2020, the Institut Pasteur has been engaged in research in several of its areas of scientific expertise, including virology, diagnostics, pathophysiology, epidemiology, modeling, therapeutic research and vaccine research. A number of research programs to find a vaccine for SARS-CoV-2, the virus responsible for the COVID-19 epidemic, are under way. In light of the intermediate results of its Phase I clinical trial, the Institut Pasteur is stopping development of one of its vaccine candidates, the vaccine based on the measles vaccine virus.