Five million people (most of them children) die each year of tuberculosis, malaria, and AIDS, all of which lack vaccines. Another 2 million die of rotavirus (which causes severe diarrhea), pneumococcus, and other diseases for which vaccine development is moving slowly. And another 3 million people die annually of pneumonia, hepatitis, and other infections for which vaccines or medications exist but aren't made available because the money or the logistical infrastructure for producing, distributing, and administering the drugs are lacking.