<https://www.flaironline.nl/corona/vaccins-werken-tegen-alle-varianten-virus/#webpage>
<http://schema.org/datePublished>
"2021-05-20T15:54:15+00:00"^^<http://schema.org/Date>
<https://www.flaironline.nl/corona/vaccins-werken-tegen-alle-varianten-virus/>