Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)61866-8
Flu	free resource	MedlinePlus Health Information	https://medlineplus.gov/flu.html
	subscription/membership/fee required	ClinicalKey	https://www.clinicalkey.com/content/playBy/pii?v=S0140-6736(08)61866-8