About: http://webisa.webdatacommons.org/313949785

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	Until last year, 75% of these cases were imported, mainly from Nigeria and Ghana, but a marked change was seen in the second half of 1982, when 71% of cases were indigenous in origin.
http://www.w3.org/ns/prov#wasQuotedFrom	pubmedcentralcanada.ca