If you are sexually active it is important to get tested, especially if you have different partners. But if your partner has it and manages it correctly then there is a low risk of transmission. I had a relationship for 5 years with someone who was infected but the person managed it well and we were very cautious. Don't write someone off because they have it. After the 5 year relationship I still don't have it. I get tested for it once a year even though I have a regular thing with someone who doesn't have it either. It is theorized that some people are immune to it but that is just a theory. Even with a condom someone can pass it along if they have an outbreak. But if they are taking the drugs then you are pretty safe.