What do I need to show the airlines if I have a medical contraindication to receiving a COVID-19 vaccine?

What do I need to show the airlines if I have a medical contraindication to receiving a COVID-19 vaccine?

What do I need to show if I have a medical contraindication to receiving a COVID-19 vaccine? You must show a letter from a licensed physician documenting the medical contraindication to the airline or aircraft operator before boarding a flight to the United States. Oct 25, 2021

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