Lancet Regional Health Americas
Heat linked to higher respiratory death risk in Brazilian migrants
Against the temperature linked to lowest mortality, extreme heat was associated with respiratory death relative risks of 1.32 among internal migrants and 1.06 among…Against the temperature linked to lowest mortality, extreme heat was associated with respiratory death relative risks of 1.32 among internal migrants and 1.06 among non-migrants.

Case-control study in peopleRespiratory disease
Who was studied4,935,541 deceased members of low-income Brazilian families, against non-migrants
What changedHeat-related respiratory death risk was 26% higher among internal migrants than non-migrants
The catchUnmeasured respiratory infections could confound the link between temperature and respiratory deaths