We are trying to see if ... reminding the immune system of that vaccine will make a difference, perhaps it works, perhaps it doesn't, but it's definitely worth trying ... (because) we just need to know if it can help us through this COVID-19 crisis.

Andreas Diacon

If you look at BCG as a potentially cheap and available tool that African countries could afford ... it does make sense, the results will be relevant for ... parts of the world that do not have access to first world medicine.