About: http://webisa.webdatacommons.org/75525559

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The longest follow-up available to date is 8.5 years for the monovalent vaccine trial [24].
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov