WASHINGTON, United States (AFP) — Clinical trials to determine the safety and efficacy of a Covid-19 vaccine candidate from American biotech company Novavax have begun in the United States and Mexico, the US National Institutes of Health (NIH) announced Monday. A similar Phase 3 trial for the same vaccine, called NVX-CoV2373, is also under way in the United Kingdom, where about 15,000 volunteers have been recruited. In the US and Mexico, the new trials will […]