As of December 15, PubMed/MEDLINE citations (including the backlog of citations indexed since November 19 with 2015 MeSH), the MeSH database, and the NLM Catalog were updated to reflect 2015 MeSH.
The MeSH translation tables were also updated on December 15. Now that end-of-year activities are complete, MEDLINE/PubMed may be searched using 2015 MeSH vocabulary, however, don’t be surprised if your search comes up empty. It will take a little bit of time for Indexers to begin to use the new terms. For example, the term Courage was added to MeSH for 2015, but it has yet to be applied to a citation.
This link will show you the details for all MeSH data changes made for 2015. http://www.nlm.nih.gov/mesh/introduction.html Scroll down to item #4 and look at the list of new descriptors/MeSH headings.
On December 16th, NLM will resume daily MEDLINE updates to PubMed (they’ve been on hold due to year-end-processing).