Study B: The wife or other female sexual partner is interviewed once at the beginning of the study and again when Study A is completed. The interview takes about 10 minutes and includes questions about the couple's sexual activity to help define the risk of becoming infected with HIV. In addition, blood is drawn to test for antibodies to HIV. The questionnaire and blood sample will be repeated at the time the patient is switched from blinded study therapy to open-label ZDV. (AMENDED 11/01/89) The results of the blood test are given to the person being tested. Information about the transmission of HIV and counseling are provided. It is recommended that the wife abstain from sexual contact with her husband, but if she does not, the use of condoms or condoms plus a spermicide is recommended. The decision about the type of precautions to take does not influence the opportunity to participate in the study.