An ingredient in the vaccines used by Moderna and Pfizer, called polyethylene glycol (PEG) has already caused severe anaphylactic shock in some patients. American and Dutch researchers declared in 2013: The accumulating evidence documenting the detrimental effects of PEG on drug delivery make it imperative that scientists in this field break their dependence on PEGylation.” Seven years later they are still using it. Can it be that it is perhaps one of the lesser evils in the drug, hence it was not worthwhile excluding it.