You should not get the Pfizer or Moderna vaccine if you have a serious allergy (anaphylaxis) to:
- Those who have a serious allergy to polyethylene glycol (PEG)
- A previous dose of a COVID-19 vaccine or to any part of the vaccine
Tell your health-care provider if you have had anaphylaxis but no cause was found after seeing an allergy specialist, or if you had anaphylaxis before and did not get seen by an allergy specialist.