Name Info Provider Link
H1N1 Flu (Swine Flu) free resource MedlinePlus Health Information https://medlineplus.gov/h1n1fluswineflu.html
subscription/membership/fee required Nature Publishing Group https://doi.org/10.1038/461020a
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=19727174.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19727174/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/19727174