Tom Frieden

Zika is spread by mosquitos. They are tough to control. It will bite four or five people at one blood meal. They can breed in the amount of water it takes to fill up a bottle cap or, theoretically, even a drop of water. You have to get rid of maybe 90% of them or more before you protect people.

It is only when you watch the dense mass of thousands of ants, crowded together around the Hill, blackening the ground, that you begin to see the whole beast, and now you observe it thinking, planning, calculating. It is an intelligence, a kind of live computer, with crawling bits for its wits.