Name	Info	Provider	Link
Flu	free resource	MedlinePlus Health Information	https://medlineplus.gov/flu.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25934861/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/25934861
	free resource	scite Smart Citations	https://scite.ai/reports/25934861
	subscription/membership/fee required	Silverchair Information Systems	https://journals.aai.org/jimmunol/article-lookup/doi/10.4049/jimmunol.1402283