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Self-reported and biological indicators of unprotected among HIV-serodiscordant couples at enrolment (‘pre-couples’ voluntary HIV counselling and testing, CVCT’) and over follow-up (‘post-CVCT’) (A: M+F− couples; B: M−F+ couples). *p-trend <0.01 for differences over calendar time. 95% error bars (Clopper-Pearson exact) shown. CVCT, couples' HIV voluntary counselling and testing; RPR, rapid plasma regain.
