Concept

Results: 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

  • The placebo experienced no antibody increase from the baseline
  • The low dose had a 97% seroconversion of specific antibodies on day 28 and a significant antibody response
  • 96 of 129 participants who received the low dose reported solicited ADRs and 1 reported a severe ADR
  • the high dose had a 96% seroconversion of specific antibodies on day 28 and a significant antibody response
  • 183 of 253 participants who received the high dose reported solicited ADRs and 24 reported a severe ADR
  • T cell responses were negative in 99% of participants
  • The vaccines induced significant specific IFNγ-ELISpot responses
  • no serious ADRs were documented
  • The vaccine candidate was found to be safe at low doses and capable of a significant immune response in the majority of subjects after a single injection

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Updated 2020-12-23

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SARS-CoV-2 (COVID-19)

Biomedical Sciences