Having herpes increases the risk of acquiring or transmitting HIV.

In our simplified model we applied the estimated annual probability of acquiring HIV among high-risk urban women.

In addition, recent research has shown that women infected with chlamydia have a three- to five-fold increased risk of acquiring HIV, if exposed.

Learn about the risk factors for acquiring HIV.

Based on data from several sources, we assumed 0.019 as the base case annual probability of acquiring HIV in the absence of the intervention.

Precise values for annual probability of acquiring HIV were difficult to obtain.

'This means that the number of women acquiring HIV per year cannot be counted in the thousands, or even the hundreds of thousands,' he said.

Behavioral interventions, which have proven effective in reducing the risk of acquiring or transmitting HIV.

People devote less sympathy to individuals who had control during the event when they acquired HIV.