According to Rainbow Kids and Chances By Choice:
Requirements are flexible for adopting HIV exposed children, so inquire even if you do not meet the stated criteria. Single parents are allowed to adopt from Haiti. Couples should show proof of marriage or proof of cohabitation for 10 years. One parent should be between the ages of 35-55. In the past, only 2 children in the home were allowed, although this orphanage is allowing up to 5 children in the home for married couples (not singles).
Travel is required. First trip is 5 days. Second trip to get the child’s visa at the American embassy and bring the child home. Traveling to Haiti from North America is relatively easy.
Timeline: Chances by Choice states 10-14 months from the time the dossier is submitted. Rainbow Kids states 2-3 years total from start to finish.
Bethany Christian Services has also had photolistings of waiting children with HIV.
God’s Littlest Angels and blog