_:b56858449	<http://www.w3.org/ns/oa#exact>	"protective efficacy" .
_:b56858448	<http://www.w3.org/ns/oa#hasSelector>	_:b56858449 .
_:b56858449	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56858448	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/62835611a546dbb9daa051060f54a72e2fcf417c/0> .