PubMed

A free database maintained by the United States National Library of Medicine at the National Institutes of Health that indexes millions of biomedical and life sciences citations and abstracts from thousands of scientific journals worldwide. As one of the most widely used academic search engines in the medical field, it provides researchers, clinicians, students, and healthcare professionals with comprehensive access to peer-reviewed literature spanning medicine, nursing, dentistry, veterinary medicine, pharmacy, allied health, and preclinical sciences. The platform supports Boolean logic queries, MeSH medical subject heading term searching, author and journal name filtering, publication date range restrictions, and field-specific searching that lets users target abstracts, titles, or author affiliations. Each citation record includes the abstract when available, MeSH term assignments, author keywords, publication type classification, grant funding acknowledgement, and links to the full text at publisher websites or through institutional subscriptions. The Clinical Queries feature provides specialised search filters for therapy, diagnosis, aetiology, prognosis, and clinical prediction guides, helping clinicians find evidence-based answers quickly. The platform integrates with literature management tools through exportable citation formats. A mobile-optimised interface and API access enable programmatic retrieval for systematic reviews and meta-analyses. The database is updated daily with new citations and retrospective corrections.