Lauren Masceranhas in CNN:
More research emerged this week in potential support of using the tuberculosis vaccine Bacillus Calmette-Guerin (BCG) as a tool in the fight against coronavirus. Researchers found that countries where many people have been given the vaccine have had less mortality from Covid-19. While that doesn’t mean that BCG somehow reduces the risk of severe illness form a coronavirus infection, it fits in with other research that suggests BCG can boost people’s immunity in general, and perhaps help against the coronavirus. The World Health Organization has cautioned against the use of the BCG vaccine for coronavirus until more is known, but teams around the world are studying the possibility it may help. Luis Escobar of Virginia Polytechnic Institute and colleagues used existing data to explore whether countries without a national BCG vaccination program have greater coronavirus mortality rates. In order to make a fair comparison, they accounted for factors such as population density, access to health care and response to Covid-19.