1. It was found that mass treatments of persons showing signsand symptoms of yaws did not eradicate the disease.
2. A surveyof a typical South Pacific island seemed to showthe reservoirof infection to be among youths to the age ofseventeen whoshowed neither signs or symptoms, but gave a yawshistory.
3.The infection rate among youths is universal so that eradicationof the disease seems only possible by mass treatments of youthsto age seventeen, with symptomatic treatment of others.