Answer given by Ms Kyriakides on behalf of the European Commission
The Commission confirms that there is no ferromagnetic or metallic material in all the vaccine formulations approved for use in the EU.
The composition of all authorised COVID-19 vaccines is described in Section 6 of the patient information leaflet and graphene oxide is not listed in the composition of these products:
— Comirnaty — mRNA
— Spikevax — mRNA
— Vaxzevria, COVID-19 Vaccine (ChAdOx1-S [recombinant]) — adenovirus
— COVID-19 Vaccine Janssen, INN-Ad26.COV2-S, recombinant — adenovirus
There are currently no approved COVID-19 DNA vaccines in the EU.
In addition to the original quality assessment, each batch of product in the EU is also released by an independent official medicines control laboratory before it may be marketed. This release involves testing of some key parameters and a comprehensive manufacturing protocol review for each batch.
The Commission, together with the European Medicines Agency, is ensuring that COVID-19 vaccines made available in the EU correspond to high standards of safety, quality and efficacy.
-  https://www.ema.europa.eu/en/documents/product-information/comirnaty-epar-product-information_en.pdf
-  https://www.ema.europa.eu/en/documents/product-information/spikevax-previously-covid-19-vaccine-moderna-epar-product-information_en.pdf
-  https://www.ema.europa.eu/en/documents/product-information/vaxzevria-previously-covid-19-vaccine-astrazeneca-epar-product-information_en.pdf
-  https://www.ema.europa.eu/en/documents/product-information/covid-19-vaccine-janssen-epar-product-information_en.pdf