<http://webisa.webdatacommons.org/29195042> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/29195042> <http://www.w3.org/ns/prov#value> "Of course, 50 percent effectiveness is far less than the 90 percent-plus protection offered by established vaccines against polio, measles, whooping cough, tetanus and other infections." . <http://webisa.webdatacommons.org/29195042> <http://www.w3.org/ns/prov#wasQuotedFrom> <kios.org> . <http://webisa.webdatacommons.org/prov/338027214> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/29195042> . <http://webisa.webdatacommons.org/prov/316647689> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/29195042> .