student reported feeling sick following a family trip to Cancun, Mexico.
The seventh-grader at St. Mel felt sick last Monday and went home. Another classmate missed school on Wednesday with flu-like symptoms, and by Friday seven students were out, school officials said.
The small Catholic school in Fair Oaks has shut its doors through at least Wednesday.
Governments are racing to find and contain pockets of swine flu around the globe, seeking to stem both the threat of a pandemic and public panic.
The Obama administration declared a public health emergency on Sunday.
"We're preparing in an environment where we really don't know ultimately what the size or seriousness of this outbreak is going to be," U.S. Homeland Security Secretary Janet Napolitano said Sunday.
In Mexico, the outbreak's epicenter, soldiers handed out 6 million face masks to help stop the spread of the novel virus that is suspected in up to 103 deaths. Most other countries are reporting only mild cases so far, with most of the sick already recovering. Cases have been confirmed in Canada — six — and the U.S. — 20 — and other countries from Spain to New Zealand were investigating whether other people with flulike symptoms really have this new swine flu or something else.
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There is not a global pandemic yet, but waiting until scientists know if the new virus is going to spread rapidly and easily would be too late.
The U.S. declared the health emergency amid confusion about whether new numbers really mean ongoing infections — or just that health officials had missed something simmering for weeks or months. But the move allows the government to ship roughly 12 million doses of flu-fighting medications from a federal stockpile to states in case they eventually need them.
President Barack Obama is set to address the health crisis Monday in remarks to a meeting of the nation's top scientists. His administration sought on Sunday to strike a balance, informing Americans without panicking them.
"We do think this will continue to spread but we are taking aggressive actions to minimize the impact on people's health," said Dr. Richard Besser, acting chief of the Centers for Disease Control and Prevention.
The World Bank said it would send Mexico $25 million in loans for immediate aid and $180 million in long-term assistance to address the outbreak, plus advice on how other nations have dealt with similar crises. Mexico officials say the flu strain may have sickened 1,614 people since April 13 but laboratory testing to confirm that and how many truly died from it — at least 22 so far out of the 103 suspected deaths — is taking time.
Worldwide, attention focused sharply on travelers.
"It was acquired in Mexico, brought home and spread," Nova Scotia's chief public health officer, Dr. Robert Strang, said of Canada's first confirmed cases.
A New York City school where eight cases were confirmed will be closed Monday and Tuesday, and 14 schools in Texas, including a high school where two cases were confirmed, will be closed for at least the next week.
China, Russia and Taiwan began planning to quarantine travelers arriving from flu-affected areas if they have symptoms. Italy, Poland and Venezuela advised citizens to postpone travel to affected parts of Mexico and the U.S.
In Singapore, the health ministry said it began using thermal scanners at Changi International Airport to check passengers arriving from the United States. Travelers with high temperatures would be given a thorough medical examination, it said.
Multiple airlines, including American, United, Continental, US Airways, Mexicana and Air Canada, are waiving their usual penalties for changing reservations for anyone traveling to, from, or through Mexico, but have not canceled flights.
Officials along the U.S.-Mexico border were asking health care providers to take respiratory samples from patients who appear to have the flu. Travelers were being asked if they visited flu-stricken areas.
The U.S. hasn't advised against travel to Mexico but does urge precautions such as frequent hand-washing while there, and began questioning arriving travelers about flu symptoms.
Roughly 12 million doses of the antiviral drug Tamiflu will be moved from a federal stockpile to places where states can quickly get their share if they decide they need it, Napolitano said.
Public health officials say a seventh grader in Sacramento County is confirmed to have had the eighth case of swine flu in California. The
