4.5 Article

Immunogenicity and reactogenicity of BNT162b2 booster in BBIBP-CorV-vaccinated individuals compared with homologous BNT162b2 vaccination: Results of a pilot prospective cohort study from Lebanon

期刊

VACCINE
卷 39, 期 46, 页码 6713-6719

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.vaccine.2021.10.007

关键词

Homologous immunization; Heterologous immunization; BBIBP-CorV; BNT162b2; COVID-19; Lebanon

资金

  1. Makassed General Hospital
  2. National Institute of Allergy and Infectious Diseases, National Institutes of Health, Department of Health and Human Services, United States of America [75N93019D00026]

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A study conducted in Lebanon found that administering a BNT162b2 booster dose to COVID-19-naive individuals who had received two doses of the BBIBP-CorV vaccine was safe and resulted in significantly higher anti-spike IgG levels compared to homologous BNT162b2 immunization.
Facing new COVID-19 waves, the effectiveness of BBIBP-CorV has been noted to be low in countries whose populations were already administered two doses of the vaccine. Heterologous vaccination using ChAdOx1-S/BNT162b2 elicited higher immunogenicity compared with homologous immunization. BBIBP-CorV/BNT162b2 combination is worth testing. In this pilot prospective cohort study conducted at Makassed General Hospital, Beirut, Lebanon, from February 17, 2021, to June 30, 2021, we tested the safety and immunogenicity of a BNT162b2 booster dose in COVID-19-naive individuals who had received two doses of the BBIBP-CorV vaccine. Heterologous booster vaccination was found to be safe and well tolerated. It was significantly associated with higher anti-spike IgG geometric mean titers compared to that after homologous BNT162b2 immunization in COVID-19-naive individuals [(8040 BAU/mL, 95% confidence interval (CI), 4612-14 016) vs (1384 BAU/mL, 95% CI, 1063-1801), respectively, (P < 0.0001)]. In countries with limited access to mRNA vaccines and where populations have already received BBIBP-CorV, mixing BBIBP-CorV/BNT162b2 is seen to overcome the low immunogenicity induced by BBIBP-CorV alone, thus potentially providing protection against emerging variants. (c) 2021 Elsevier Ltd. All rights reserved.

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