1.https://www.sciencealert.com/australia-is-trialling-a-tb-vaccine-for-coronavirus-and-health-workers-get-it-first/amp. 2. https://www.news-medical.net/news/20200324/German-scientists-test-TB-vaccine-against-coronavirus.aspx. 3. https://nltimes.nl/2020/03/18/tb-vaccine-help-fight-coronavirus-experiment-starts-two-dutch-hospitals. and other countries...