Another explanation might be lack of social support networks, which may be helpful in adhering to the vaccination series. In addition, newly homeless Whites may not have built up sufficient trust with the minority program staff in the short study period, and lack of trust has been reported to be an important barrier to treatment completion (Altice, Mostashari, & Friedland, 2001). The findings also suggest that newly homeless Whites may have different healthcare needs than those of chronically homeless persons. Designing culturally tailored programs for newly homeless White homeless persons might assist their rates of completion of the hepatitis vaccine series.