id author title date pages extension mime words sentences flesch summary cache txt cord-271528-ob4l0bcf Bar-Zeev, Naor COVID-19 vaccines: early success and remaining challenges 2020-09-04 .txt text/plain 1498 87 51 In The Lancet, Denis Y Logunov and colleagues from the N F Gamaleya Research Institute of Epidemiology and Microbiology in Russia present findings from two phase 1/2, non-randomised, open-label studies of a heterologous, replication-deficient, recombinant adenovirus vector-based vaccine in both frozen and lyophilised formulations. In Logunov and colleagues' studies, however, the threshold for neutralisation was set high in two regards: the inoculating viral dose was large, and no arising cellular damage was allowable. Safety and immunogenicity of an rAd26 and rAd5 vector-based heterologous prime-boost COVID-19 vaccine in two formulations: two open-label, non-randomised phase 1/2 studies from Russia Immunogenicity and safety of a recombinant adenovirus type-5-vectored COVID-19 vaccine in healthy adults aged 18 years or older: a randomised, double-blind, placebo-controlled, phase 2 trial Safety and immunogenicity of the ChAdOx1 nCoV-19 vaccine against SARS-CoV-2: a preliminary report of a phase 1/2, single-blind, randomised controlled trial ./cache/cord-271528-ob4l0bcf.txt ./txt/cord-271528-ob4l0bcf.txt