BCG epidemiology supports its protection against COVID-19? A word of caution Szigeti, Reka ; Kellermayer, Domos ; Trakimas, Giedrius ; Kellermayer, Richard Abstract Publication: PLoS ONE Pub Date: October 2020 DOI: 10.1371/journal.pone.0240203 Bibcode: 2020PLoSO..1540203S