AUTHOR=Gong Wenping , An Huiru , Wang Jie , Cheng Peng , Qi Yong 

TITLE=The Natural Effect of BCG Vaccination on COVID-19: The Debate Continues

JOURNAL=Frontiers in Immunology

VOLUME=13

YEAR=2022

URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2022.953228

DOI=10.3389/fimmu.2022.953228

ISSN=1664-3224