I wonder how they will deal with AZ, mixed AZ/mRNA, or mixed mRNA (Moderna, Pfizer) vaccines. Especially now that they plan on opening up International travel When they start requiring proof of vaccine. I’m kind of concerned having a mix of mRNA I won’t be considered fully vaccinated by their standards.
The article @pigletto posted says fully vaccinated but US idea of fully vaccinated differs from ours.
The CDC considers a mixed dose of two mRNA vaccines to be fully vaccinated. See https://www.cdc.gov/vaccines/covid-.../covid-19-vaccines-us.html#Interchangeability :
QUOTE [ bold added ]
Using the above strategies, every effort should be made to determine which vaccine product was received as the first dose to ensure completion of the vaccine series with the same product. In exceptional situations in which the mRNA vaccine product given for the first dose cannot be determined or is no longer available, any available mRNA COVID-19 vaccine may be administered at a minimum interval of 28 days between doses to complete the mRNA COVID-19 vaccination series. In situations where the same mRNA vaccine product is temporarily unavailable, it is preferable to delay the second dose to receive the same product than to receive a mixed series using a different product. If two doses of different mRNA COVID-19 vaccine products are administered in these situations (or inadvertently), no additional doses of either product are recommended at this time. Such persons are considered fully vaccinated against COVID-19 ≥2 weeks after receipt of the second dose of an mRNA vaccine.
END QUOTE
From one of the later footnotes, this how the CDC sees mixed mRNA doses administered in the US: "Although CDC provides considerations for a mixed series in exceptional circumstances, this is still considered an administration error that requires VAERS reporting as a mixed series is not authorized under the vaccine Emergency Use Authorizations".
Also, from further down on the page, in the section about people vaccinated outside the US, for those wondering about AZ-AZ [it is fine, since it is WHO-listed and AZ-AZ is the complete dual dose series]:
Only people who have received all recommended doses of an FDA-approved, FDA-authorized, or WHO-listed COVID-19 vaccine are considered fully vaccinated for the purpose of public health guidance.