Tissue histology following nanoformulated antiretroviral therapy (nanoART) injections in mice. A, Hematoxylin and eosin staining of sections from liver, spleen, lung, and kidney in nonreconstituted, noninfected NSG mice treated with 2 weekly subcutaneous injections of 250 mg/kg each atazanavir (ATV)/ritonavir (RTV) (M3001 + M2001). B, Tissue histology of peripheral blood lymphocyte (PBL)–reconstituted, human immunodeficiency virus type 1 (HIV-1)–infected NSG mice treated with 2 weekly subcutaneous injections of either ATV/RTV (H3001 and H2001, 250 mg/kg each) or ATV/RTV/efavirenz (EFV) (H3001, H2001, and H4001, 100 mg/kg each) or untreated (PBS). All images at ×200 magnification. Bar = 100 μm.