Dr. Derek Freedman:

I am emphasising that the patients who come to us who have had contact with a prostitute or professional sex worker are much less likely to have an infection than an ordinary person who has been picked up in any bar in town and had unprotected sex. The point I am making quite clearly is that sex workers are professionals and look after their business. They use protection and infection through them is rare. Studies of sex workers carried out extensively in many countries have shown that when a sex worker acquires an infection, it is much more likely to be acquired from a boyfriend or pimp than an actual client.