Abstract
The COVID-19 outbreak at the end of 2019 has accelerated the development and research for COVID-19 vaccines worldwide. Among the COVID-19 vaccines in clinical trials developed via different platforms, recombinant virus vector-based vaccines have shown excellent immunogenicity and efficacy. However, at the same time, there are serious issues such as vaccine safety and pre-existing antibodies against vectors. This article summarizes the design concept and development history of recombinant virus vector-based vaccines, and focuses on the progress in the clinical studies of vector-based COVID-19 vaccines as well as the challenges, in order to provide reference for the research of recombinant vector-based vaccines.
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