Journal
NATURE COMMUNICATIONS
Volume 13, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-022-30835-1
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The BBIBP-CorV (Sinopharm) vaccine has been assessed for its effectiveness against severe COVID-19 disease using data from Abu Dhabi. The vaccine showed an effectiveness of 80% against hospitalization, 86% against critical care admission, and 84% against death. However, the effectiveness declined over time, suggesting the need for booster doses to increase protection against severe COVID-19 outcomes.
There is limited real-world evidence for the effectiveness of the BBIBP-CorV (Sinopharm) vaccine against severe COVID-19 disease. Here, the authors use data from Abu Dhabi and estimate effectiveness at 80% against hospitalization; 86% against critical care admission and 84% against death. The effectiveness of the inactivated BBIBP-CorV vaccine against severe COVID-19 outcomes (hospitalization, critical care admission and death due to COVID-19) and its long-term effectiveness have not been well characterized among the general population. We conducted a retrospective cohort study using electronic health records of 3,147,869 adults, of which 1,099,886 vaccinated individuals were matched, in a 1:1 ratio to 1,099,886 unvaccinated persons. A Cox-proportional hazard model with time varying coefficients was used to assess the vaccine effectiveness adjusting for age, sex, comorbidity, ethnicity, and the calendar month of entry into the study. Our analysis showed that the effectiveness was 79.6% (95% CI, 77.7 to 81.3) against hospitalization, 86% (95% CI, 82.2 to 89.0) against critical care admission, and 84.1% (95% CI, 70.8 to 91.3) against death due to COVID-19. The effectiveness against these severe outcomes declined over time indicating the need for booster doses to increase protection against severe COVID-19 outcomes.
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