On 11 July 2009 World Population Day was observed worldwide. The main focus of this year’s World Population Day: investing in women and girls. Investments in education and health for women and girls have been linked to increases in productivity, agricultural yields, and national income — all of which contribute to the achievement of the MDGs. Investments by governments worldwide have raised school enrolment rates, narrowed the gender gap in education, brought life-saving drugs to people living with AIDS, expanded HIV prevention, delivered bed nets to prevent malaria, and improved child health through immunization.