"United States" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus,
MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure,
which enables searching at various levels of specificity.
A country in NORTH AMERICA between CANADA and MEXICO.
Below are MeSH descriptors whose meaning is more general than "United States".
Below are MeSH descriptors whose meaning is more specific than "United States".
This graph shows the total number of publications written about "United States" by people in this website by year, and whether "United States" was a major or minor topic of these publications.
To see the data from this visualization as text, click here.