Flight cancelled – re- routed

[Butterworth26]

I was booked on a direct flight to Buenos Aires with BBA. They have recently cancelled that flight and put me on another flight via Rio de Janeiro.
My problem is that I am unable to have a yellow fever vaccination and therefore I am concerned that being in transit in/through Rio will count as me having entered Brazil and as I understand it if I do that I need to have a yellow fever vaccination certificate to enter Argentina from Brazil.
So far, I cannot find an answer to the status of transit passengers en route to Argentina via Brazil.

[Gary]

https://www.fitfortravel.nhs.uk/destinations/south-america-antarctica/argentina

Under Vaccinations “No yellow fever vaccination certificate required for this country.”

[Michael C]

The only “risk” would be if you were to then, say, travel to SEAsia, where some countries
request a yellow fever certificate.

[JDB]

BA has historically and then again recently flown to Buenos Aires via Brazil. A yellow fever certificate is not an issue as you don’t get off the aircraft. However, as BA has cancelled the non-stop, you may wish to consider whether you want to accept their rerouting on the one stop flight via Rio on a rattly old 777 or if you might prefer to go with IB, which obviously does require a plane change in Madrid, but is ultimately a far more agreeable journey.

[LD27]

@Butterworth26. I’m also unable to have yellow fever vaccine. You may find this helpful.

https://cdn.who.int/media/docs/default-source/travel-and-health/countries-with-risk-of-yellow-fever-transmission.pdf?sfvrsn=bf42ac59_4&download=true