Swine flu is spreading faster and claiming new fatalities in Europe, health officials said, as the global death toll from the virus rose to nearly 5,000 victims and the US said millions had been infected.
Since the A(H1N1) virus was uncovered in April, there have been over 4,735 deaths reported to the World Health Organisation as of a week ago, the WHO said.
Most of the fatal cases -- 3,539 -- have been recorded in North and South America, the UN health agency said in its latest update on the flu pandemic.
A top US health official said Friday swine flu had infected "many millions" and killed over 1,000 people in the United States since the outbreak began six months ago.Related article: US swine flu cases
"We have seen, since the beginning of the pandemic in April and May, more than 1,000 deaths from pandemic influenza and more than 20,000 hospitalizations in this country," Centers for Disease Control and Prevention (CDC) chief Thomas Frieden told reporters.
"We have had, up until now, many millions of cases of pandemic influenza in the US, and the numbers continue to increase," he added, lamenting the scarcity of influenza A(H1N1) vaccine.
With the winter flu season approaching in the northern hemisphere, swine flu deaths were reported in several European countries this week, with Dutch health officials saying the situation has reached an epidemic level.
"The spread of the A(H1N1) virus in the Netherlands accelerated this week. It is now a small epidemic," said the Dutch institute for health and the environment in a statement.