Health workers have tested about 1,200 birds found dead last year for the West Nile virus.
The three states, as well as New York City, have tested about the same number of birds and mosquitoes.
Although a few toddlers could not be coaxed into donning the eye-trackers, so far the researchers have tested about 70 children with the devices.
The federal Centers for Disease Control and Prevention said today that it had tested about 20 Boca Raton postal workers who might have come into contact with mail bound for the stricken Florida publishing company, American Media Inc.
Canada has tested only about 10,000 animals in the last decade, and has had a serious backlog of cases.
Thync has tested its prototype on about 3,000 people to date.
Adds David Montefiori, a veteran AIDS researcher at Duke University Medical Center who has been evaluating how AIDS vaccines produce antibodies: "I've tested just about everything anybody has tried, and this is the best I've seen".
Over the years, physiologists have tested theories about how people get cold with the help of various crews of human guinea pigs, from hardy students to members of the armed forces.
By the end of this year, Gerald Levin plans to have tested FSN in about 4000 households in Orlando, Florida.
