Patient with HIV-related thrombocytopenia. The y-axis depicts platelet counts (×1,000/μL), whereas the x-axis depicts time (days). (▪) Platelet counts while the patient was receiving AZT; (□) platelet counts off AZT. Anti-D treatments are indicated (▵) along the x-axis. Good responses to anti-D were only seen with concomitant AZT treatment, despite the fact that AZT alone did not improve the platelet count. No difference in hemoglobin decrease after anti-D was seen with the use of AZT (data not shown).