<http://ns.inria.fr/covid19/PMC7429220#body_text>	<http://purl.org/dc/terms/subject>	"Personal protective equipment" .
<http://ns.inria.fr/covid19/PMC7429220#body_text>	<http://purl.org/dc/terms/subject>	"Medical masks" .
<http://ns.inria.fr/covid19/PMC7429220#body_text>	<http://purl.org/dc/terms/subject>	"Diseases and disorders" .