Safety, reactogenicity, and immunogenicity of ZR-202-CoV and ZR-202a-CoV recombinant vaccines compared with Comirnaty®: a randomized, observer-blind, controlled, phase 1 study.
Year: 2024
Type: article
Study designs: Randomized Controlled Trial, Clinical Trial
Abstract: Objectives: ZR-202-CoV and ZR-202a-CoV are novel recombinant vaccines containing 25 μg of the prototype (Wuhan strain) or B.1.351strain (Beta variant) SARS-CoV-2 S-protein expressed in CHO cells, respectively, adjuvanted with Al(OH) 3 and CpG-ODN.We assessed their safety and immunogenicity in this Phase I, randomized, observer-blind, controlled study in Mali.Design: Sixty healthy 18-55-year-old adults randomized 1:1:1 received two doses of ZR-202-CoV, ZR-202a-CoV, or Comirnaty R 28 days apart.Primary outcome measures were solicited and unsolicited adverse events (AEs) including AESI (Adverse Events of Special Interest); secondary outcome was immunogenicity measured as SARS-CoV-2 specific neutralizing antibodies.Participants were followed up for 1 year.Results: Injection site pain and headache were the most frequent solicited local and systemic AEs, respectively.No unsolicited AEs or SAEs related to vaccination were reported during the study period.Although most participants had detectable neutralizing antibodies at baseline robust immune responses were observed in all vaccine groups after the first dose with no further increase after the second dose.Crossneutralizing antibody responses against Beta, Delta, and Omicron BA.5 variants were similar in magnitude after ZR-202-CoV, ZR-202a-CoV and Comirnaty R .Conclusions: Similar reactogenicity and immunogenicity profiles of ZR-202-CoV, ZR-202a-CoV and Comirnaty R support further clinical investigation in a wider population.
Language: English
Subfield: Infectious Diseases
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $2,500
OpenAlex ID: W4402494424