[Excerpt from author] The pressures on Mfeka and Nkabinde reflect a global problem that is finally receiving attention from donors and international agencies: a critical shortage of health care workers in many parts of the world. Although this shortage is not new, recent international efforts to vaccinate children and to fight human immunodeficiency virus (HIV) infection and AIDS, malaria, tuberculosis, and other diseases have brought it into sharper focus. Donors are increasingly realizing that without enough trained workers to deliver drugs, vaccines, and care, pumping money into projects will not have the desired effects. "Even if you have the medicine, the vaccines, and the bed nets, you need the health workers to deliver the service," says Manuel Dayrit, director of the Department of Human Resources for Health at the World Health Organization (WHO). "With the experience of the last few years, where you have had huge global funds move into an activity to provide resources . . . we've found that the bottleneck is really the delivery."