As per a study published in one of the journals of non-profit American Association for the Advancement of Science, Bacillus Calmette-Guerin or BCG can slow down the rate of infection and death of COVID-19. 

The study states that the United States, which is one of the worst affected countries by coronavirus, would not have such a high mortality fatality rate if BCG vaccination would have been initiated in the USA decades ago. As per the research, BCG vaccine helps develop immunity against various other infectious diseases, perhaps including Covid-19.

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For the uninitiated, BCG vaccine is usually given to a new-born to prevent tuberculosis. For the research, experts analysed daily rate of increase of confirmed cases in 135 countries and deaths in 134 countries in the first 30-day period of each countrys outbreak. It was found during the research that mandatory BCG vaccination correlated with a flattening of the curve in the spread of Covid-19.

The research, however, makes it clear that the BCG vaccine cannot be treated as a magic bullet against COVID-19. The research comes at a time when many countries across the world are trying to develop a vaccine for Coronavirus.