SYDNEY - Australian researchers are fast-tracking large-scale human testing to see if a vaccine used for decades to prevent tuberculosis can protect health workers from Covid-19, they announced Friday .
"Although originally developed against tuberculosis, and still given to over 130 million babies annually for that purpose, BCG also boosts humans' 'frontline' immunity, training it to respond to germs with greater intensity," they said in a statement. He said the 4,000 subjects would be enrolled in the trial within weeks under a fast-tracked process with the approval of state and federal health authorities.Similar trials are being conducted in several other countries including the Netherlands, Germany and the United Kingdom.