_:b57312353	<http://www.w3.org/ns/oa#exact>	"protective efficacy" .
_:b57312352	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/d9072f6bad53d859040bd7341cb0236246ea677c/3> .
_:b57312353	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57312352	<http://www.w3.org/ns/oa#hasSelector>	_:b57312353 .