Knowledgebase Coverage
This knowledgebase focuses only on communicable diseases, with an emphasis on emerging communicable diseases of interest to the public health community.
We welcome your article suggestions.

Knowledgebase Information Sources
Only research articles describing original scientific studies and results are included in a knowledgebase.
With few exceptions, these articles contain tables and/or figures describing the study environment, methods and results.
Letters, meta-analyses, reviews and practice guidelines are not included in a knowledgebase.

Search Basics
Simple Search: The default search setting is 'Research Findings.' Only one term or phrase can be entered in the search box.

Advanced Search: Select a search field from the pull-down menu and enter a term in the text box. Click AND, OR, or NOT to add the term to the query box. Boolean operators are available:

AND (Intersection): only those articles that contain the selected terms.
OR (Union): articles contain at least one of the selected terms.
NOT (Difference): articles containing the selected term are excluded.

Search Limits
Limit your search to specific citation fields by selecting a search field from the pull-down menu:

Abstract
Authors
Genes/Proteins
MeSH Keywords
Organisms/Subjects
Research Findings
Source of Organisms/Subjects
Tables/Figures
Title

Search Using the Thesauri
Thesauri are sets of terms, often referred to as "controlled vocabulary" or "indexing terms," that provide a hierarchical structure and language for searching. We use a controlled vocabulary thesaurus based on both the domain and the Unified Medical Language System.

The following thesauri can be searched using the "Browse by Topic" feature:

Authors
Genes/Proteins
Organisms/Subjects
Research Findings
Source of Organisms/Subjects