Just like the theory that everybody has already been infected so IFR must be really low, and/or not too dissimilar theory that there had already been a wide round of coronavirus infections as early as Dec/Jan, I think this is most likely just another “cope” (wishful thinking).
I avoided posting about it initially, but it still seems to be doing the rounds, so here goes. Open up the Wikipedia. France had mandatory BCG vaccination for schoolchildren from 1950-2007. But lots of French people are dying regardless.
So any protection it gives must be modest.
Really, the most obvious explanation is that they simply confounded ex-Communist countries (which are generally in an earlier stage of the epidemic, mostly on account of their lower level of connections with Italy) with the BCG vaccine.
But we’ll know soon enough anyway.
There is no evidence that the Bacille Calmette-Guérin vaccine (BCG) protects people against infection with #COVID19. Two clinical trials addressing this question are underway & WHO will evaluate the evidence when it is available. https://t.co/gWmsDKxFID
— World Health Organization (WHO) (@WHO) April 13, 2020