by Daniel Lawler Agence France Presse As vaccine makers rush to stamp out new Covid-19 variants, some scientists have set their sights higher, aiming for a universal coronavirus vaccine that could tackle any future strains and possibly even stave off another pandemic. Since the race for a first Covid jab supercharged a new generation of vaccine technology, there have been numerous efforts to develop pan-coronavirus immunisation. Drew Weissman of the University of Pennsylvania, who […]