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Safety and Efficacy of Rcp Recombinant Spike Protein Covid-19 Vaccine Compared to Sinopharm Bbibp: A Phase Iii, Non-Inferiority Trial Publisher



Solaymanidodaran M1, 2 ; Kalantari S3 ; Banihashemi SR4 ; Eshaghi A5 ; Nofeli M4 ; Mohazzab A6, 7 ; Mokhberalsafa L8 ; Sadeghi F9 ; Mokaram AR8 ; Moradi MH4 ; Razaz SH4 ; Taghdiri M4 ; Lotfi M9 ; Setarehdan SA6 Show All Authors
Authors
  1. Solaymanidodaran M1, 2
  2. Kalantari S3
  3. Banihashemi SR4
  4. Eshaghi A5
  5. Nofeli M4
  6. Mohazzab A6, 7
  7. Mokhberalsafa L8
  8. Sadeghi F9
  9. Mokaram AR8
  10. Moradi MH4
  11. Razaz SH4
  12. Taghdiri M4
  13. Lotfi M9
  14. Setarehdan SA6
  15. Masoumi S10
  16. Ansarifar A6
  17. Ebrahimi S11
  18. Esmailzadehha N6
  19. Boluki Z12
  20. Khoramdad M6
  21. Molaipour L6
  22. Rabiei MH13
  23. Amiri FB14
  24. Filsoof S15
  25. Banivaheb B15
  26. Derakhshani MR6
  27. Bayazidi S6
  28. Golmoradizadeh R16
  29. Shahsavan M6
  30. Safari S6
  31. Ghahremanzadeh N6
  32. Mohseni V6
  33. Erfanpoor S6
  34. Fallah Mehrabadi MH17
Show Affiliations
Authors Affiliations
  1. 1. Clinical Trial Center, Iran University of Medical Science, Tehran, Iran
  2. 2. Minimally Invasive Surgery Research Center, Hazrat-e-Rasool Hospital, Iran University of Medical Science, Tehran, Iran
  3. 3. Departments of Infectious Diseases and Tropical Medicine, Iran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Research and Development, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
  5. 5. Department of Physico Chemistry, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
  6. 6. School of Public Health, Iran University of Medical Sciences, Tehran, Iran
  7. 7. Reproductive Biotechnology Research Center, Avicenna Research Institute Tehran, ACECR, Tehran, Iran
  8. 8. Department of QA, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
  9. 9. Department of Quality Control, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
  10. 10. Department of Biostatistics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
  11. 11. Department of Infectious Diseases, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
  12. 12. Knowledge Utilization Research Center, Tehran University of Medical Sciences, Tehran, Iran
  13. 13. Department of Epidemiology, Faculty of Veterinary Medicine, University of Tehran, Iran
  14. 14. Department of Epidemiology and Biostatistics, Research Centre for Emerging and Reemerging Infectious Diseases, Pasteur Institute of Iran, Tehran, Iran
  15. 15. School of Medicine, Iran University of Medical Sciences, Tehran, Iran
  16. 16. Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
  17. 17. Department of Epidemiology, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran

Source: Heliyon Published:2024


Abstract

Background: We conducted a phase III, non-inferiority trial comparing safety and efficacy of RCP recombinant spike protein Covid-19 vaccine to BBIBP (Sinopharm). Methods: Adult Iranian population received RCP or BBIBP in a randomized, double blind and an additional non-randomized open labeled trial arms. Eligible participants signed a written informed consent and received two intramuscular injections three weeks apart. In the randomized arm, an intranasal dose of vaccine or adjuvant-only preparation were given to the RCP and BBIBP recipients at day 51 respectively. Participants were actively followed for up to 4 months for safety and efficacy outcomes. Primary outcome was PCR + symptomatic Covid-19 disease two weeks after the second dose. The non-inferiority margin was 10% of reported BBIBP vaccine efficacy (HR = 1.36). Results: We recruited 23,110 participants (7224 in the randomized and 15,886 in the non-randomized arm). We observed 604 primary outcome events during 4 months of active follow-up including 121 and 133 in the randomized and 157 and 193 cases in the non-randomized arms among recipients of RCP and BBIBP respectively. Adjusted hazard ratios for the primary outcome in those receiving RCP compared with BBIBP interval were 0.91 (0.71–1.16) and 0.62 (0.49–0.77) in the randomized and non-randomized arms respectively. The upper boundary of 99.1% confidence interval of HR = 0.91 (0.67–1.22) remained below the margin of non-inferiority in the randomized arm after observing the early stopping rules using O'Brien Fleming method. Conclusion: Our study showed that the RCP efficacy is non-inferior and its safety profile is comparable to the BBIBP. © 2024 The Authors
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