3′-Azido-2′,3′-dideoxyuridine (AzdU) is a nucleoside analog of Zidovudine (HY-17413). 3′-Azido-2′,3′-dideoxyuridine is a potent inhibitor of human immunodeficiency virus (HIV) replication in human peripheral blood mononuclear cells (PBMC) with limited toxicity for human bone marrow cells (BMC).