i. after taking multiple different medications, with no reason known for the reaction. This may mean they are allergic to polyethylene glycol (PEG), OR ii. after having a vaccine or a medicine that contains polyethylene glycol (PEG), OR iii. for unexplained reasons? This may mean they are allergic to polyethylene glycol (PEG). If yes, they cannot get this vaccine today, they should get specialist advice. Talk to the vaccination team. If no, GO TO NEXT QUESTION.