CDC Epidemiologic Investigations of Human H5N1 Cases

Indonesia, 2006: WHO reported evidence of human-to-human spread. In this situation, 8 people in one family were infected. The first family member is thought to have become ill through contact with infected poultry. This person then infected six family members. One of those six people (a child) then infected another family member (his father). No further spread outside of the exposed family was documented or suspected.

Source: Centers for Disease Control