On or after May 18 2020 The National Library of Medicine will be changing over to a new PubMed Interface as their default
Both legacy and new PubMed run in parallel for a short time For more information check out the New PubMed Transition FAQs
PubMed comprises over 22 million citations for biomedical literature from MEDLINE, life science journals, and online books. PubMed citations and abstracts include the fields of biomedicine and health, covering portions of the life sciences, behavioral sciences, chemical sciences, and bioengineering. PubMed also provides access to additional relevant web sites and links to the other NCBI molecular biology resources.
PubMed is a free resource that is developed and maintained by the National Center for Biotechnology Information (NCBI), at the U.S. National Library of Medicine (NLM), located at the National Institutes of Health (NIH).
The National Library of Medicine (NLM) has produced many high quality video tutorials to help users build searches and navigate the database.