[pieceofthepuzzle]

Brazil is a beautiful, large country, and depending on where she was biking, the concept of ‘spraying for mosquitos’ would be a joke. Great swaths of Brazil are rainforest, and wild. If you've ever flown over the Amazon, you are amazed by how huge/wide it is (can be almost 25 miles wide during the rainy season), and it is surrounded by vegetation.

[rlmorel]

The concept of spraying for mosquitoes isn’t a joke. It is pretty straightforward.

You don’t have to eradicate all the mosquitoes in a country or region, only the ones near places of human habitation.

Something DDT was great at with nearly zero effects on non-targeted entities including humans and animal life.