How safe is Graphene Oxide?

Many people realise there is Graphene Oxide in the COVID vaccines affecting fertility, heart health and causing blood clots.  Less well known is that the PCR nasal swab test deposits Graphene ‘up the nose’.  Graphene is a relatively new material with few published safety studies, being manufactured only since 2014.  Parents are popping off their kids for a PCR test every five minutes – as requested by the schools the children attend, having no concerns at all as to the safety of the tests.  Should they be concerned?