<http://ns.inria.fr/covid19/PMC7386681#body_text>	<http://purl.org/dc/terms/subject>	"Occupational Safety and Health Administration" .
<http://ns.inria.fr/covid19/PMC7386681#body_text>	<http://purl.org/dc/terms/subject>	"Physical chemistry" .
<http://ns.inria.fr/covid19/PMC7386681#body_text>	<http://purl.org/dc/terms/subject>	"Secretion" .
<http://ns.inria.fr/covid19/PMC7386681#body_text>	<http://purl.org/dc/terms/subject>	"Respirators" .