Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	http://jgv.microbiologyresearch.org/pubmed/content/journal/jgv/10.1099/vir.0.024885-0
Flu Shot	free resource	MedlinePlus Health Information	https://medlineplus.gov/flushot.html
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:20719991