Safety and immunogenicity of an rAd26 and rAd5 vector-based heterologous prime-boost COVID-19 vaccine in two formulations: two open, non-randomised phase 1/2 studies from Russia

Denis Y. Logunov, Inna V. Dolzhikova, Olga V. Zubkova, Amir I. Tukhvatulin, Dmitry V. Shcheblyakov, Alina S. Dzharullaeva, Daria M. Grousova, Alina S. Erokhova, Anna V. Kovyrshina, А Г Ботиков, Fatima M. Izhaeva, Olga Popova, Tatiana A Ozharovskaya, I. B. Esmagambetov, I. A. FAVORSKAYA, Denis I. Zrelkin, Daria V. Voronina, Dmitry N. Shcherbinin, А. С. Семихин, Yana V. Simakova, Elizaveta A. Tokarskaya, Nadezhda L. Lubenets, Д.А. Егорова, М. М. Шмаров, Н. А. Никитенко, Morozova Lf, Е. А. Smolyarchuk, Е. V. Kryukov, V. F. Babira, Sergei V. Borisevich, Boris S. Naroditsky, Gintsburg Al