Multiple databases include information on H1N1 or swine flu, such as MEDLINE and CINAHL.
In MEDLINE (medical-related database), navigate to the MeSH (medical subject headings) at the top. Search for H1N1. Select "Influenza A Virus, H1N1 Subtype" and then Search Database. Add other search limiters as appropriate.
In CINAHL (nursing-related database), navigate to CINAHL Subject Headings at the top. Search for "swine flu." Select one or multiple subject headings from the list, then click Search Database. Add other search limiters as appropriate.