About: http://webisa.webdatacommons.org/39851392

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	Herd immunity is a concept that derived from observing natural immunity in animal herds exposed to actual disease.
http://www.w3.org/ns/prov#wasQuotedFrom	scienceblogs.com