<http://ns.inria.fr/covid19/PMC6951814#body_text>	<http://purl.org/dc/terms/subject>	"Immunology journals" .
<http://ns.inria.fr/covid19/PMC6951814#body_text>	<http://purl.org/dc/terms/subject>	"Smallpox vaccines" .
<http://ns.inria.fr/covid19/PMC6951814#body_text>	<http://purl.org/dc/terms/subject>	"Modes of production" .