On Sunday, when the things finally got started, the spotlight on the improvised stage at the Hospital das Clínicas in São Paulo fell on nurse Mônica Calazans, who has been doing her shifts in an intensive care unit for years. Calazans pulled off her scrubs and sank into a chair. A younger medic stood next to her and opened the door to a refrigerator. Inside were vials of a just-approved vaccine for the coronavirus.Calazans, a heavy-set woman suffering from diabetes, had a serious look on her face as she peered through her large glasses.All of Brazil was watching her.In July, when the local...…On Sunday, when the things finally got started, the spotlight on the improvised stage at the Hospital das Clínicas in São Paulo fell on nurse Mônica Calazans, who has been doing her shifts in an intensive care unit for years. Calazans pulled off her scrubs and sank into a chair. A younger medic stood next to her and opened the door to a refrigerator. Inside were vials of a just-approved vaccine for the coronavirus.Calazans, a heavy-set woman suffering from diabetes, had a serious look on her face as she peered through her large glasses.All of Brazil was watching her.In July, when the local...WW…