In a recent review by Al-Mterin et al. [9], numerous ICPMs (e.g., CTLA-4, BTLA, TIM3, VISTA, LAG3, TIGIT, PD1, Galectin-9, PD-L1, and CD112) were reviewed with regard to their capacity to predict the course of COVID-19. Here, LGALS9 is linked to COVID-19.