“…Such examples of HIV infection have been well documented among hemophiliacs in the nineties (Kleim et al, 1990), which was followed by several other outbreaks of blood borne pathogens worldwide, such as HCV (Bresee et al, 1996; Echevarria et al, 1996; Lawlor et al, 1999; Lefrere et al, 1996), Parvovirus 19, and Hepatitis A virus (Blumel et al, 2002; Jee et al, 2006; Johnson et al, 1995; Kupfer et al, 1995; Mannucci et al, 1994; Soucie, Siwak, Hooper, Evatt, & Hollinger, 2004). Since HIV incidence is rising along the U.S./Mexico border (Strathdee & Magis-Rodriguez, 2008), it is worthy to consider that HIV antibody screening could theoretically miss a small number of HIV-infected IDUs in the window period.…”