Abstract: this should be 300 words and should contain a description of your data source, your variables, your research question, and your findings. Also contains 3-5 keywords.
Background: An introduction to the problem that your paper will address and a brief literature review. The lit review should have 10-20 sources at the minimum. This should look like a literature review you would see in a public health journal, which is to say NOT an annotated bibliography. And it should be written in APA format. Probably around 4-5 paragraphs, at the most.