How long should patients be observed for signs of an immediate allergic reaction following vaccination with a COVID-19 vaccine?

In accordance with general best practices for vaccination, all people should be observed for at least 15 minutes after vaccination for signs of an immediate allergic reaction.

If you vaccinate a person who has a precaution to COVID-19 vaccination, you should consider a 30-minute observation period following vaccination. See CDC’s detailed considerations for people with a history of allergies or allergic reactions: www.cdc.gov/vaccines/covid-19/clinical-considerations/interim-considerations-us.html#history-allergies-reactions.