On the cover: Pascuale et al. (pp. 100706-1–100706-9) provide information about the immunogenicity of heterologous vaccine combinations against SARS-CoV-2, employing different platforms developed around the world including the Moderna, AstraZeneca, Sinopharm, Sputnik V, and Cansino vaccines. This study shows a number of combinations that are equivalent or superior to the homologous schemes, providing a strategy to achieve wide coverage in regions of the globe facing limited vaccine supply, as illustrated in the cover image. The authors are thankful to Luciana Giono for help with the cover design.
