Originally Posted by Radiant Flyer

I just got back from Rio, spent 1 week. I was also there in April for 1 week as well. ... I was also in Sao Paulo, JAN, FEB and MARCH for 1 week, I did not see one bug on all trips. In the urban areas which includes the touristy beach area of Rio bug eradication has been pretty successful.

In Rio I stayed in Barra da Tijuca and every evening you could see the bug bombs going off in the nearby forrest, you could also smell it in the early evening... smelled like a camp ground.

If you were going hiking in the forrest outside the city I would worry, but in urban areas, Sao Paulo and Rio... an encounter with a mosquito would be rare... like I said in the 5 weeks I've spent in Brazil I did not see 1 bug.