This total exceeds the 849 deaths directly attributed to seasonal influenza in 2006.

In addition, a positive result does not distinguish between seasonal and avian influenza A viruses.

The trial also included 100 cases of severe seasonal influenza from each of those countries and the United States.

There are on average 2,500-3,000 deaths every year as a result of seasonal influenza in Australia.

Children and pregnant women are two groups of people who are at high risk of serious complications from seasonal influenza.

Having the ability to identify disease activity early on and being able to respond quickly can reduce the impact of seasonal and pandemic influenza.

FluMist is a vaccine of demonstrated effectiveness against seasonal influenza.

In Europe, this virus was responsible for 2 900 deaths, well below the number of deaths caused by seasonal influenza.

The annual toll from seasonal influenza in the US is more accurately estimated at 3000-49,000 deaths per year.

"We estimate the death rate in young people is five times higher than is typical for seasonal influenza," Schuchat said.