I had one unprotected encounter with a sex worker Did following tests Rapid Test at 3 months Negative COMBO Test Negative at 24 week too RNA PCR negative at 24 week 5 days negative too Elisa Test at 25 weeks Negative Combo Test at approx 7 months negative too Western blot test negative too at more than 7 months no other exposure Negative Hepatitis B, C and VDRL too is it conclusive?