In Brazil's case, as least, it's simpler than that.
Mosquito eradication used to be done at the federal level, with military like organization. It kept things in control.
A few years ago it has been re-assigned to municipalities. Not only are local authorities less equipped to handle it, but mosquitoes do not conform to city boundaries. If one city is doing a good job but it's neighbor isn't you're screwed.
There's probably lots to be done through technical advances, but most of this could be avoided using common sense.
Mosquito eradication used to be done at the federal level, with military like organization. It kept things in control.
A few years ago it has been re-assigned to municipalities. Not only are local authorities less equipped to handle it, but mosquitoes do not conform to city boundaries. If one city is doing a good job but it's neighbor isn't you're screwed.
There's probably lots to be done through technical advances, but most of this could be avoided using common sense.