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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한백신학회 Clinical and Experimental Vaccine Research Clinical and Experimental Vaccine Research Vol.13 No.1
- 발행연도
- 2024.1
- 수록면
- 35 - 41 (7page)
- DOI
- 10.7774/cevr.2024.13.1.35
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초록· 키워드
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Purpose: The effectiveness of coronavirus disease 2019 (COVID-19) vaccination schemes and the combination of vaccines of various platforms for administering booster doses is still being studied since it will depend on the population’s response to vaccines. We aimed to evaluate the safety, protection, and immunogenicity of the Salvadorean population’s third dose booster COVID-19 vaccine and the potential benefit of homologous vs. heterologous regimens.
Materials and Methods: This is an analytical observational cohort study in a population aged 18 to 65 years that was primarily vaccinated with AstraZeneca, Sinovac, or Pfizer/BioNTech.
Volunteers were recruited (n=223) and followed up for 3 months after receiving the 3rd vac cine (BNT162b2) as a booster. Adverse reactions were monitored, serum anti-spike immuno globulin G (IgG) was assessed by chemiluminescence, and a polymerase chain reaction was carried out when subjects developed clinical signs.
Results: The cohorts finally included 199 participants, and we observed only mild adverse effects in all cohorts. A significant increase in specific IgG levels was found after the booster dose in all cohorts. The heterologous scheme with Sinovac showed the greatest increase in antibody titer, and a decrease was observed in all participants after 3 months. During the follow-up period, 30 participants showed symptomatology compatible with COVID-19, but only four were laboratory-confirmed and they showed mild clinical signs.
Conclusion: These findings indicate that the booster doses used were safe and promoted an immediate increase in immunogenicity, which decreased over time. The heterologous regi men showed stronger immunogenicity compared to the messenger RNA-based homologous scheme.
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