What causes disease?
For any "disease" or condition, you could start by considering interactions among environmental and social factors.
» Poor diet, resulting from food choices, "causes" nutritional deficiency or obesity in a population
» Is it "caused" by historical distribution of land use, including (in developing countries) during colonial times?
» Or by the regulatory environment, including crop subsidies, food inspections, etc.?
» What about the role of NGOs, IGOs, aid networks?
» What about infrastructure, such as food distribution networks, transportation, etc.?
» Is the status of women/girls a factor?
» What about mental health issues?
» What is the role of commercial activity?
» What about the healthcare and health insurance system?
Let's talk about indexing!
» Do you want articles on labor or articles on labor? Or is it labour?
» Do you want articles on HIV (a virus) or articles on HIV diseases (such as AIDS)?
» Is epidemiology a concept relating to the causes and distribution of diseases, or is it what epidemiologist do?
» What's the difference between diet, food, food supply, food habits, food chain, nutritional status, eating, energy intake, ...?
» Is lead a noun or a verb?
Indexing facilitates more precise search statements, especially for topics that are vague or ambiguous.
Using index terms also helps you avoid the need to think of every possible synonym or alternate spelling of your search terms.
Indexing means the citations in the database are assigned terms from a controlled vocabulary (Not all databases use a controlled vocabulary, however)
Index terms are sometimes called descriptors or thesaurusterms; in PubMed they are called Medical Subject Headings, or MeSH
» More information and examples under the Find Articles and More tab.