WHO says swine flu pandemic is imminent

MEXICO CITY — Global health authorities warned Wednesday that swine flu was threatening to bloom into a pandemic, and the virus spread farther in Europe even as the outbreak appeared to stabilize at its epicenter. A toddler who succumbed in Texas became the first death outside Mexico.

Mexico, taking a drastic step as confirmed swine flu cases doubled to 99, including eight dead, announced it would temporarily suspend all nonessential activity of the federal government and private business from May 1-5. Essential services like transport, supermarkets, trash collection and hospitals will remain open.

New deaths finally seemed to be leveling off after an aggressive public health campaign in Mexico — only one additional confirmed death was announced Wednesday night. But the World Health Organization said the global threat is nevertheless serious enough to ramp up efforts to produce a vaccine against the virus.

"It really is all of humanity that is under threat during a pandemic," WHO Director General Margaret Chan said in Geneva. "We do not have all the answers right now, but we will get them."

It was the first time the WHO had declared a Phase 5 outbreak, the second-highest on its threat scale, indicating a pandemic could be imminent.

The first U.S. death from the outbreak was a Mexico City toddler who traveled to Texas with family and died Monday night at a Houston hospital. U.S. Health and Human Services Secretary Kathleen Sebelius predicted the child would not be the last U.S. death from swine flu.

The virus, a mix of pig, bird and human genes to which people have limited natural immunity, had spread to at least nine countries. In the United States, nearly 100 have been sickened in 11 states.

Eight states closed schools Wednesday, affecting 53,000 students in Texas alone, and President Barack Obama said wider school closings might be necessary to keep crowds from spreading the flu. Mexico has already closed schools nationwide until at least May 6.

"Every American should know that the federal government is prepared to do whatever is necessary to control the impact of this virus," Obama said, highlighting his request for $1.5 billion in emergency funding for vaccines.

Just north of the Mexican border, 39 Marines were being confined to their California base after one contracted swine flu. Senators questioned Homeland Security Secretary Janet Napolitano about her decision not to close the border, action she said "has not been merited by the facts."