COVID-19 altogether but to lessen the severity of the pathogen and prepare the innate immune system to fight against the virus.The trials started after research comparing rates of coronavirus infections in countries that widely use the tuberculosis vaccine against those that do not initially draw attention to the idea that the inoculation could offer protection.If shown effective, those vaccines could potentially provide protection against the second wave of coronavirus, according to the Post.A professor of medicine at Columbia University Medical Center said that BCG can improve people's ability to fight off other pathogens.Azra Raza said that the low death rates from coronavirus disease in Pakistan and other countries shocked her.