A new way to deliver drugs using a common protein could be used to develop mosaic vaccines, which are vaccines effective against multiple strains of a virus like COVID-19, among other medicines in a global first. A new way to deliver drugs using a common protein could be used to develop mosaic vaccines, which are vaccines effective against multiple strains of a virus like COVID-19, among other medicines in a global first. Bio & Medicine Phys.org – latest science and technology news stories