MRC1 and simian immunodeficiency virus infection: The colony stimulating factor-1 receptor (CSF1R) inhibitor, BLZ945, was found to mostly eradicate simian immunodeficiency virus infection of the non-human primate rhesus macaque brain CD163 and CD206 expressing perivascular macrophages (Bohannon et al., 2024), leaving the largely uninfected but required microglia preservation (Pasciuto et al., 2020) mostly intact.