Figure 3

Model-projected annual rates of reported infectious syphilis under equivalent test volume strategies. Results are based on 1000 realizations of each intervention scenario and are presented as mean values with corresponding 95% uncertainty bounds. Prior to 2011, all scenarios included annual screening only, with the specified interventions implemented at the start of 2011 (indicated by a dashed line). 3-monthly and 100% annual screening (black lines) required approximately the same number of screening tests annually, as did the 6-monthly and 52% annual screening (grey lines).