Concept

Discussion: 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

  • No significant difference was found between the high and low dose groups response in specific antibody production
  • positive T cell responses were measured in 90% and 88% of the high and low dose groups respectively
  • Preexisting immunity and older age negatively impacted the responses to vaccination
  • Most adverse reactions were mild to moderate and resolved in less than 2 days
  • Most people reported worse adverse reactions in the high dose group than the low dose group
  • The low dose group has a good safety profile and the results support its testing in a phase 3 clinical trial

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Updated 2020-12-28

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SARS-CoV-2 (COVID-19)

Biomedical Sciences