evidence: Pfizer says it does not use graphene oxide and no such ingredient is listed in any of the three COVID-19 vaccines authorized for use in the U.S. [...] Pfizer spokesperson Jerica Pitts said the company does not use graphene oxide, and no graphene oxide is present in its COVID-19 vaccine. [...] An Instagram post claimed that the Pfizer COVID-19 vaccine is "99% graphene oxide," which is "toxic to the human body and causes a number of problems."