BCG vaccine

In the worldwide battle against COVID-19, scientists are investigating whether a century-old tuberculosis vaccine might offer some additional protection against the novel coronavirus.

And Bulgaria -- one of the world's leading manufacturers of the vaccine -- is holding out hope of new markets for the many millions of doses it produces each year.

Why has Spain had almost 11,000 deaths from the coronavirus pandemic while Portugal's death toll barely exceeds 200?

Australian medics will launch tuberculosis vaccine tests in an attempt to fight the coronavirus. They have joined a global test to find a non-traditional solution involving several countries.