About: http://webisa.webdatacommons.org/271203672

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	Large quantities of vaccine are needed and the surveillance systems, especially the laboratories, can be expensive.
http://www.w3.org/ns/prov#wasQuotedFrom	unicef.org