Table 1

Epidemiological and Clinical Characteristics of Mashhad samples.
Sample	Risk exposure	Status	CD4⁺(cells/μl)	ARV	PCR gag	PCR env

MSH01	IDU	Alive	428	Yes	Pos	Neg
MSH02	IDU	Alive	444	No	Pos	Pos
MSH03	IDU	Alive	111	No	Pos	Pos
MSH04	IDU	Alive	191	No	Pos	Pos
MSH05	Homo	Dead	n.a.	No	Neg	Pos
MSH06	IDU	Alive	400	No	Pos	Pos
MSH07	IDU	Alive	450	Yes	Pos	Pos
MSH08	IDU	Alive	408	No	Pos	Pos
MSH09	IDU	Alive	446	No	Pos	Neg
MSH10	IDU	Dead	n.a.	No	Pos	Pos
MSH11	IDU	Alive	133	Yes	Pos	Neg
MSH12	IDU	Alive	129	No	Pos	Pos

n.a, not available; homo, homosexual; IDU, injecting drug user.
Naderi et al. Infectious Agents and Cancer 2006 1:4 doi:10.1186/1750-9378-1-4