Hello,
I didn't know about BCG either. I also had to look it up. That article from The Scientist (referred to in my comment above) is quite interesting. It seems BCG does offer protection against a variety of respiratory illnesses and protection lasts for many years. The information about the Basque Province is interesting and may help to provide insight in the future.
Thank you for your comment. I really do enjoy feedback.
Regards,
AG
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