Extreme caution required:I had seen references to it the day before yesterday ,.. was very sceptical so this morning I checked the BCG countries .. the co relationship is striking . Yes the IT article spurred me. Even more so is the Portugal Spain comparison ,and references in Germany between DDR and West German cantons.. It is very interesting and hopeful
https://www.medrxiv.org/content/10.1101/2020.03.24.20042937v1