A study on the relationship between BCG vaccination and Covid-19 prevalence: Do other confounders warrant investigation?

Author:

Mariita Richard M.ORCID,Musila Jonathan M.

Abstract

AbstractThe Covid-19 pandemic, which originated from Wuhan, Hubei province, China, and quickly spread to the rest of the globe is caused by SARS-CoV-2, a single-stranded RNA virus. Preliminary data suggest a relationship between the BCG vaccine and the prevalence of Covid-19. The BCG vaccine is used in the prevention of tuberculosis, a disease that is most prevalent in developing countries. To determine the potential protective role of BCG vaccination, this study investigated the occurrence of Covid-19 and the relationship between the spread of Covid-19 in countries that offer BCG vaccination and those that do not. The study also performed a phylogenetic analysis of the strains involved in the Covid-19 outbreak from the representative countries. To achieve the objectives, the study utilized publicly available data on population size, vaccination coverage, and Covid-19 cases. Phylogenetic analysis was used to determine if some SARS-CoV-2 strains were more prevalent than others. The study revealed a significant negative trend between countries that offer the BCG vaccine to the general population and the reported cases of Covid-19. The study proposes future molecular and immunological analyses to determine the potential role of BCG vaccination in protection against Covid-19. This will determine if BCG has antiviral properties, with the possibility of recommending it for widespread use if supported by scientific data.

Publisher

Cold Spring Harbor Laboratory

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