 He designed a methodology for integrated population-based HIV-testing which was implemented in several developing countries and has become a standard methodology for international demographic and health surveys.HIV testing data generated by using this methodology was recently used by UNAIDS to lower the estimate of the number of people afflicted by HIV in the world by 7 million cases.A multinational study of the anemia prevalence among women and children implemented under his leadership has led to improved anemia control and prevention and reproductive health programs in several countries in Central Asia, Egypt, and India.