Some of them work even they have HIV
Italian police arrested HIV positive Romanian prostitute
The fact that one did it once is hardly a statistic. Talking about "them" in this way always sounds like racial profiling. I've met a few Romanian girls, both in flats here and on streets where I come from, and on average they were all astonishingly attractive, and quite good at what they were doing (admittedly, I try to be careful when I choose).
Yes, they do it for the money and not the romance. Yes, culturally they can come through as cold and distant. Still, they were (almost) all very good at what they were doing.