Table 1.

Number of female sex workers attending the Sisters program and effect on P given the total female sex worker population = 15,000 in Harare.

Reference period to April 23, 2015	Number of unique female sex workers attending, M	Estimated P, assuming population = 15,000
1 month	85	.006
3 months	560	.037
6 months	952	.063
12 months	1542	.103
24 months	2227	.148