tetano
Editor, Senior Moderator
Monaldi Arch Chest Dis
. 2021 Aug 9.
doi: 10.4081/monaldi.2021.1875. Online ahead of print.
BCG vaccination impact on mortality and recovery rates in COVID-19: A meta-analysis
Surjit Singh[SUP] 1 [/SUP], Daisy Khera[SUP] 2 [/SUP], Ankita Chugh[SUP] 3 [/SUP], Sameer Khasbage[SUP] 4 [/SUP], Pushpinder S Khera[SUP] 5 [/SUP], Vinay Kumar Chugh[SUP] 6 [/SUP]
Affiliations
Abstract
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.
. 2021 Aug 9.
doi: 10.4081/monaldi.2021.1875. Online ahead of print.
BCG vaccination impact on mortality and recovery rates in COVID-19: A meta-analysis
Surjit Singh[SUP] 1 [/SUP], Daisy Khera[SUP] 2 [/SUP], Ankita Chugh[SUP] 3 [/SUP], Sameer Khasbage[SUP] 4 [/SUP], Pushpinder S Khera[SUP] 5 [/SUP], Vinay Kumar Chugh[SUP] 6 [/SUP]
Affiliations
- PMID: 34461704
- DOI: 10.4081/monaldi.2021.1875
Abstract
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.