BSG and COVID-19: Therefore, BSG is a potential predictive biomarker for tumors (Hatanaka et al., 2016; Qiao et al., 2020; Tseng et al., 2020), which may serve as a biological modulator of tumor and COVID-19 and improve the management of cancer patients during the period of the COVID-19 pandemic (Varadarajan et al., 2020).