The Bacille Calmette-Guerin or BCG vaccine, originally made against tuberculosis, has a general stimulating effect on the immune system and is effective against Covid-19, say researchers. They compared volunteers who have received a BCG vaccine in the past five years (before the corona pandemic), showing that the vaccine is safe and possibly influences Covid-19 symptoms.

from Science News - Times of India https://ift.tt/2Dw8qgh