The Progress of Nations is an annual report that records progress made around the world in improving the lives of children. The first part of the 2000 report focuses on the impact of AIDS on youth. The second part of the report focuses on the importance of early childhood care. The third part focuses on the progress of immunization efforts. The fourth part focuses on "the lost children," who are the poorest of the poor, the most exploited, and who are invisible in society because of their profound poverty.