<http://ns.inria.fr/covid19/PMC7416803#title>	<http://purl.org/dc/terms/subject>	"Southern European countries" .
<http://ns.inria.fr/covid19/PMC7416803#title>	<http://purl.org/dc/terms/subject>	"2019 health disasters" .
<http://ns.inria.fr/covid19/PMC7416803#title>	<http://purl.org/dc/terms/subject>	"Medical physics" .