Guanabara Bay

But in Rio’s sister city of Niteroi, just across the Guanabara Bay, it’s a different story.

The Rio Star, the giant Ferris wheel overlooking Guanabara Bay, also was lit up to welcome Swift to town: “Love’s a Game, Wanna Play?” it said, referencing her “Blank Space” lyric.

“When I got there, the mangrove was almost completely devastated, due to the leachate, which had been released for a long time, and the garbage that arrived from Guanabara Bay,” recalled Mario Moscatelli, a biologist hired by the city in 1997 to assist officials in the ambitious undertaking.

The view will have to compete with the spectacular sight tourists have looking out over Guanabara Bay from the Christ standing atop Rio's Corcovado mountain.

Fiocruz has already carried out a mass vaccination program with AstraZeneca on the Paqueta island in Rio’s Guanabara Bay, as well as in Botucatu, a city in Sao Paulo state.