Bacillus Calmette-Guérin vaccination as defense against SARS-CoV-2 (BADAS): a randomized controlled trial to protect healthcare workers in the USA by enhanced trained immune responses. - DiNardo AR; Arditi M; Kamat AM; Koster KJ; Carrero S; Nishiguchi T; Lebedev M; Benjamin AB; Avalos P; Lozano M; Moule MG; McCune B; et al. (Trials, 2023)