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. Author manuscript; available in PMC: 2016 Jan 4.
Published in final edited form as: AIDS. 2011 Nov 28;25(18):2295–2299. doi: 10.1097/QAD.0b013e32834c4c22

Figure 1. The impact of treating discordant couples to prevent transmission as a function of treatment coverage.

Figure 1

Treatment coverage (i.e., the percentage of discordant couples that receive antiretroviral therapy) ranges from 0 to 100%. Results are shown for Lesotho (black), Malawi (red), Rwanda (blue), and Ghana (green). The effect of treatment coverage on the annual incidence rate (per 1000 person-years) (a) and (b) and on the annual number of infections prevented (c) and (d). Calculations shown in (a) and (c) are based on the assumption that 40% of the population is in stable partnerships; stable partnerships include concordant positive, concordant negative and discordant couples. Calculations shown in (b) and (d) are based on the assumption that 70% of the population is in stable partnerships.