"Peru" 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.
MeSH information
A country in western South America, bordering the South Pacific Ocean, and located between Chile and Ecuador.

This graph shows the total number of publications written about "Peru" by people in this website by year, and whether "Peru" was a major or minor topic of these publications.
Bar chart showing 1720 publications over 28 distinct years, with a maximum of 166 publications in 2015 and 2016
To see the data from this visualization as text, click here.