BCG vaccination impact on mortality and recovery rates in COVID-19: A meta-analysis

Monaldi Archives for Chest Disease

Vinay Kumar Chugh¹  Ankita Chugh¹  Pushpinder S. Khera²  Daisy Khera³  Surjit Singh⁴  Sameer Khasbage⁴ 

[1] Department of Dentistry, All India Institute of Medical Sciences, Jodhpur;Department of Interventional and Diagnostic Radiology, All India Institute of Medical Sciences, Jodhpur;Department of Pediatrics, All India Institute of Medical Sciences, Jodhpur;Department of Pharmacology, All India Institute of Medical Sciences, Jodhpur;

关键词: BCG;    COVID-19;    SARS-CoV-2;   

DOI  :  10.4081/monaldi.2021.1875

来源: DOAJ

【 摘 要 】

COVID-19 is a pandemic caused by SARS-CoV-2 virus which is a very worrisome public health emergency. In this study, we compared the mortality rate and recovery rate in countries with and without BCG vaccination policy. The data of mortality of COVID-19 was extracted from worldometer (https://www.worldometers.info/coronavirus/) on 26th July 2020. The data of countries where BCG vaccination is being done for all individuals is taken from BCG world atlas (http://www.bcgatlas.org/index.php), updated in 2017. BCG vaccination policy recommended countries are intervention group versus countries without BCG vaccination policies which are regarded as control group. Pooled analysis of countries with and without BCG vaccination policy revealed mortality rate of 1.31% (95%CI – 1.31% to 1.32%; I2 = 100%, p<0.01) and 3.25% (95%CI – 3.23% to 3.26%; I2 = 100%, p<0.01), respectively. The recovery rate in two country groups were found to be 72.60% (95%CI – 72.57% to 72.63%) and 55.94% (95%CI – 55.90% to 55.98%), respectively. 52 individuals need to be BCG vaccinated to prevent one death (NNT = 52). In BCG vaccination program countries, there is statistically and clinically significant less mortality (p-value <0.001) as compared to countries without BCG policy. Our findings corroborate the hypothesis that BCG vaccination may provide protection from COVID-19. High quality evidence from randomised controlled trials are required to establish causality between BCG vaccination and protection from severe COVID-19.

【 授权许可】

Unknown