The researchers recruited 3,427 volunteers in 29 villages. One group would come back every four months to be tested for two sexually transmitted infections that are curable. Volunteers were given small gifts to come back every four months.
The researchers want to take this idea further and want to tell all the people who are participating for a lottery ticket that if they win, they get the cash only if they test negative for HIV. The same psychological forces that cause people to believe they're going to win the lottery are now working to tell them, "I've got to practice safe sex."
Author: Aline Elsermans