Several Balkan countries have reported cases of the flu in recent weeks.

Argentina's health ministry has confirmed one case of the new flu strain.

Manufacturers currently produce about 900 million shots for seasonal flu a year.

However, flu season can start as early April or late as July.

It often takes weeks or months to collect data on flu deaths.

U.S. health authorities said there currently are ample supplies of flu vaccine.

Health officials have urged people to get winter flu vaccines this year.

Swine flu is also on the rise in Europe and Central Asia.

Bird flu has swept through poultry across Asia to Africa and Europe.

A number of companies and national governments are developing bird flu vaccines.

On Tuesday, officials said bird flu had spread to a new area.

A seventh case of swine flu was confirmed in Northern Ireland tonight.

Chinese authorities tell hospitals to swiftly report suspected cases of swine flu.

Health Minister, Tony Ryall has pledged all to the swine flu fight.

A health official said the man was healthy before contracting the flu.

So far, the prospect of worldwide swine flu is causing market panics.