AUTHOR=Gong Wenping , Liu Yinping , Xue Yong , Zhuang Li 

TITLE=Two issues should be noted when designing a clinical trial to evaluate BCG effects on COVID-19

JOURNAL=Frontiers in Immunology

VOLUME=14

YEAR=2023

URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2023.1207212

DOI=10.3389/fimmu.2023.1207212

ISSN=1664-3224