Table 1. Trends in rates of coinfection with HBV and/or HCV and HIV in PWID and FSW from 2007 to 2012 in Haiphong, Vietnam.

	PWID			FSW
Year	2007	2008	2012	2007	2009	2012
n (HIV infection)	273	81	72	21	13	5
HIV infection only	8.8%	16.1%	8.3%	23.8%	38.5%	20%
HIV and HBV coinfection	2.9%	4.9%	5.6%	4.8%	0%	0%
HIV and HCV coinfection	81.3%	75.3%	83.3%	71.4%	61.5%	80%
HIV, HBV, and HCV coinfection	7.0%	3.7%	2.8%	0%	0%	0%

There were no significant differences in coinfection rates in any groups throughout the observation period. PWID: people who inject drugs, FSW: female sex workers.