<http://ns.inria.fr/covid19/PMC7231123#title>	<http://purl.org/dc/terms/subject>	"Influenza" .
<http://ns.inria.fr/covid19/PMC7231123#title>	<http://purl.org/dc/terms/subject>	"Healthcare-associated infections" .
<http://ns.inria.fr/covid19/PMC7231123#title>	<http://purl.org/dc/terms/subject>	"Essential nutrients" .