Logunov DY, Dolzhikova IV, Zubkova OV, Tukhvatullin AI, et al. 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. Lancet 2020 Sep 3. pii: S0140-6736(20)31866.
PMID: 32896291