Mexico began shutting down parts of its economy today to slow the spread of a new flu strain as officials urged increased worldwide precautions against an imminent pandemic.
The World Health Organization (WHO) said it would remain for now at its current alert level -- one notch below full pandemic -- and it would no longer refer to the H1N1 virus as "swine flu" in a nod to beleaguered meat producers.
New confirmed flu cases were reported in the United States and in Europe, although a case in Peru, which would have been the first confirmed case in Latin America outside of Mexico, was later discounted.
US officials said new infections were occurring, although worldwide only a handful of people outside Mexico have required hospital treatment. At least 298 US schools were closed because of possible flu infections.
In Mexico, the worst hit country with up to 176 deaths, president Felipe Calderon told government offices and private businesses not crucial to the economy to stop work beginning today to avoid further spreading a virus that is striking across age and class lines.
"There is no safer place than your own home to avoid being infected with the flu virus," Mr Calderon said in his first televised address since the outbreak started.
In Mexico City, where the virus has already brought public life to a standstill, some were skeptical while others vowed not to take part in the shutdown.
With its tourism industry savaged, shoppers staying home and exports to the US in steep decline, Mexico could find itself in the longest, deepest recession it has seen in years, according to analysts.
Previous studies at the World Bank have said a severe flu pandemic which triggers a clampdown on trade could cost the global economy trillions of dollars.
The WHO and flu experts say they do not yet know enough about this new strain to say how deadly it actually is, how far it might spread and how long any potential pandemic may last.
Flu epidemics generally last a few weeks or months in any single community, and can pass around the world in one or two waves over 18 months to two years before fading out.
US officials have reported 109 confirmed swine flu infections in 11 states and the only death recorded outside of Mexico -- a Mexican toddler visiting Texas.
Transportation Secretary Ray LaHood said there were no reasons to cancel flights to Mexico.
US vice president Joe Biden was forced to row back after he said on television he would tell his family to stay off planes and subways to avoid the virus.
"He said something on TV differently than what he meant to say," White House spokesman Robert Gibbs said, adding that the government guidance on simple, common-sense precautions such as hand-washing stood.
Worldwide, 11 countries have reported confirmed cases of the H1N1 strain, with the Netherlands the latest to join the list. It said a three year-old who had recently returned from Mexico had contracted the virus.
Switzerland also confirmed its first case yesterday in a man returning from Mexico. Peru's health minister Oscar Ugarte told Reuters that further tests on a suspected case there had determined it was not the new flu strain. Meanwhile, a probable case was confirmed in Ireland where Minsister for Health Mary Harney called for calm following the announcement.
Around the world flu preparations were intensified after the World Health Organization raised its alert level to phase 5, the last step before a pandemic.
The WHO recommended all countries track any suspect cases and ensure medical workers dealing with them wear protective masks and gloves. But it stopped short of recommending travel restrictions, border closures or any limitation on the movement of people, goods or services.
Keiji Fukuda, acting WHO assistant director-general, told reporters there was no new evidence to prompt the agency to move to its top alert level which would signal a global pandemic was under way.
WHO announced yesterday it was dropping the "swine flu" designation in favor of 'influenza A (H1N1)'.
In Mexico City, a metropolis of 20 million, all schools, restaurants, nightclubs and public events have been shut down to try to stop the disease from spreading, bringing normal life to a halt.
The United States, Canada and many other countries have advised against non-essential travel to Mexico. Many tourists were hurrying to leave, crowding airports.