Graphene is made entirely from carbon. Carbon plus oxygen comes as either carbon monoxide (CO) or carbon dioxide (CO2). While carbon monoxide can be a significant health danger in sufficient quantities, there just isn't enough to possibly harm you in the small volume of jewflu jab juice you get. Also, graphene is molecular carbon in the form of one carbon atom thick sheets. Each carbon atom bonds to four other carbon atoms. That means that carbon sheets cannot bond to other atoms such as oxygen since interior carbon atoms have all four bond sites already in use. Only the carbon atoms at the edge of the sheets could bond with other atoms since they are the only ones with open bond sites. What makes you think carbon and oxygen are a problem here? What is it supposed to do to you since you are made of the stuff?