Primary data sets are the original data collected by institutions and researchers. Reputable data sources usually report their collection methods. In many cases, you can filter and download data sets.
Secondary data sources use data from other sources. They often combine data from multiple sources and create data visualization tools.
Comprehensive resource for consumer-oriented health content designed to support patients' information needs and foster an overall understanding of health-related topics.
Consumer health information in the following areas: medical sciences, food sciences and nutrition, childcare, sports medicine, and general health. Full text.