IFNA2 and Kaposi's sarcoma: Both recombinant IFN-α2a and IFN-α2b as well as lymphoblastoid IFN-α are being used in clinical trials in conjunction with the nucleoside analogue zidovudine (AZT), known to be active against HIV-1, in the treatment of patients with AIDS-related Kaposi’s Sarcoma (www.clinicaltrials.gov).