Koreans with BCG Vaccinations vs Countries with Serious Coronavirus Infections?

Remember reading about Bacille Calmette-Guérin (BCG) vaccinations seem to reduce the number of deaths due to coronavirus and that they were conducting studies into it.

Also used to prevent recurrence of bladder cancer. They flush the bladder with it and the bladder walls become more resistant to cancer. In most of the cases.

Have a feeling that this could be one of the reasons why Korea has managed to keep the number of coronavirus infections in control. Along with the masks and contact tracing...

The link is to an article on the matter.

BCG Vaccine Fighting Coronavirus in South Asia