I disagree with Kertom. Truvada is ok only if you KNOW you are HIV-. You can't assume you are - because of some test you did in the past. You have to know you are HIV- at the moment you start the program and that is only possible if you run both the antibodies and RNA test. I also disagree with his view about the effect on kidneys. Each individual is different. You have to have a benchmark as to your kidney functions. Here in the US, PrEP is covered by most health insurance policies. Trust me, they would be more than happy to save money by not doing all the tests if they didn't need to.