A roundup of some of the most popular but completely untrue stories and visuals of the week. None of these are legit, even though they were shared widely on social media. The Associated Press checked them out. Here are the facts: Pfizer vaccine does not contain graphene oxide CLAIM: The Pfizer coronavirus vaccine is made up of 99.9% graphene oxide, a toxic compound. THE FACTS: Graphene oxide is not among the ingredients found in Pfizer's COVID-19 vaccine, despite alarmist claims to the contrary on social media. Videos spreading widely on Instagram and Twitter on Thursday touted a report from Spain that allegedly claimed to find graphene oxide â a material made by oxidizing graphite â in a vial of the Pfizer shot.