Prevalence and Associated Risk Factors of HTLV-1 and Co-infections of Blood-Borne Viruses in Birjand, Iran's Eastern Border.

Although a higher prevalence of the viruses was expected, it was close to the overall Iranian population. With respect to close relationship with an HTLV-1 endemic area (Mashhad and Neyshabour), the prevalence is very low; however, more attention is needed. Our findings reinforce the importance of increasing knowledge about BBV-related health risk behaviors to prevent the emergence of new cases, especially in low-risk populations.