CDC Wonder (Centers for Disease Control & Prevention)
"With CDC WONDER you can:
- Search for and read published documents on public health concerns, including reports, recommendations and guidelines, articles and statistical research data published by CDC, as well as reference materials and bibliographies on health-related topics;
- Query numeric data sets on CDC's information systems, via "fill-in-the blank" web pages. Public-use data sets about mortality (deaths), cancer incidence, HIV and AIDS, TB, natality (births), census data and many other topics are available for query, and the requested data are readily summarized and analyzed. Produce tables, maps, charts and download tab-delimited text exports of summary statistics."