that poster you replied to is pushing right wing disinfo bollocks as usual
Fact Check-COVID-19 vaccines do not contain graphene oxide
https://www.reuters.com/article/factcheck-grapheneoxide-vaccine-idUSL1N2OZ14F
Online reports that COVID-19 vaccines contain graphene oxide are unfounded.
The allegations are based on an analysis by a professor in Spain which has been rejected by experts. He obtained what he himself described as non-conclusive results after studying one vial. He said the vial was purported to contain a dose of the Pfizer-BioNTech vaccine but said it had come to him by a messenger service and acknowledged that the vial’s origin was unknown.
Pfizer told Reuters its vaccines do not contain the material. This material is also not listed in any of the widely available COVID-19 vaccines worldwide.
Social media posts and blogs with this false claim can be seen here, here , here , here . Many of the posts wrongly suggest the vaccines are therefore toxic.