Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	http://jgv.microbiologyresearch.org/pubmed/content/journal/jgv/10.1099/0022-1317-76-7-1687
Polio and Post-Polio Syndrome	free resource	MedlinePlus Health Information	https://medlineplus.gov/polioandpostpoliosyndrome.html