How an old tuberculosis vaccine might help fight the new coronavirus

There is no vaccine against the novel coronavirus, called SARS-CoV-2, that is spreading rapidly around the world. But scientists in several countries are testing a century-old tuberculosis (TB) vaccine to see if it might boost the immune system to reduce respiratory symptoms in people who get new coronavirus infections.

Researchers in Australia and Europe are testing whether the Bacille Calmette-Guerin (BCG) vaccine, introduced in the 1920s to fight tuberculosis, might be deployed to combat COVID-19, the respiratory disease caused by the novel coronavirus. Clinical trials are focused on two groups at high-risk for COVID-19: health care workers and the elderly.

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