How do macrophages protect your body from infection?

How does nitrogen oxides are produced and their air environment impact

Which foods are categorized as foods you should "eat less of" on the food label?

In a two to three page paper, examine the history and development of the healthy people initiatives. discuss some of the successes and shortfalls of the three initiatives thus far; including healthy people 2000, healthy people 2010, and healthy people 2020. be sure to include statistical data from the initiatives to support your position. don't forget to cite your sources.