. . "10.1101/2020.04.01.20049478" . . . . . . . . . . . . . . "10.1101/2020.04.01.20049478" . . . . . . . . "Differential COVID-19-attributable mortality and BCG vaccine use in countries" . . . . . . "2020-04-06"^^ . . "10.1101/2020.04.01.20049478" . . . . "Cold Spring Harbor Laboratory" . . . "c9dbd44c6aba2b3c6ee17d8296cc343fb103532a" .