About: http://webisa.webdatacommons.org/225370433

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	This is why some viruses such as AIDS are so difficult to attack, they alter their outer shell virtually every time they reproduce, making vaccines useless as quickly as they are developed.
http://www.w3.org/ns/prov#wasQuotedFrom	medhelp.org