Skip Navigation Bar
National Library of Medicine Technical BulletinNational Library of Medicine Technical Bulletin

Table of Contents: 2020 NOVEMBER–DECEMBER No. 437

Previous Next


2021 MeSH Classes: Highlights, Changes and PubMed Searching

2021 MeSH Classes: Highlights, Changes and PubMed Searching. NLM Tech Bull. 2020 Nov-Dec;(437):b8.

2020 December 16 [posted]

Please join the National Library of Medicine (NLM) and Network of the National Library Medicine (NNLM) Training Office for two events in January 2021, introducing you to 2021 Medical Subject Headings (MeSH) and teaching you how to adjust to MeSH changes in your PubMed searches and alerts.


  1. NLM Webinar: 2021 MeSH Highlights
    Join NLM staff for a highlight tour summarizing the changes for the 2021 Medical Subject Headings (MeSH). The presentation will feature examples of new and updated terminology related to:

    • COVID-19, including a brief overview of how COVID-19 related terms are identified and managed
    • Infections
    • Species terms, including bacteria, fungi and viruses, and the addition of taxonomy identifiers.

    Following the presentation, a panel of NLM Indexing and MeSH experts will be available to answer your questions.

    Date and time: Wednesday, January 13, 2021, 1:00 PM - 2:00 PM EST
    To register: https://nnlm.gov/class/2021-mesh-highlights/29396


  2. NNLM Class: MeSH Changes and PubMed Searching
    Every year, the Medical Subject Headings are updated. Join us for "MeSH Changes and PubMed Searching" to learn:

    • How do MeSH changes affect your PubMed searches?
    • What happens when a term gets changed, added, or removed; or moved to a different part of the MeSH hierarchy?
    • How do you accommodate vocabulary changes over time in your comprehensive searches?
    • How do you check your saved searches and alerts?

    Date and time: Friday, January 15, 2021, 1:00 PM - 2:30 PM EST
    To register: https://nnlm.gov/class/2021-mesh-changes-and-pubmed-searching/29384

For more information about 2021 MeSH, see MEDLINE Data Changes - 2021 and COVID-19 and SARS-CoV-2 MeSH Terms—2021.

NLM Technical Bulletin National Library of Medicine National Institutes of Health