Figure 2.

The changes of different peripheral blood cell types in HIV and severe coronavirus disease-19 (COVID-19). In COVID-19 and HIV infection, total count of natural killer cells, B cells, CD4+ T cells, regulatory T cells, memory T and B cells decrease, whereas the count of follicular helper cells increase. These common changes between HIV and COVID-19 were shown in the central circle. However, distinct changes were shown in total count of macrophage, CD8+ T cells, Th17 cells and naive T cells between people living with HIV (PLWH) and severe COVID-19. (The red arrow indicates a decrease in the number of cells; the blue arrow indicates an increase in the number of cells).