A man wearing a surgical mask dances at a public square in the Coyoacan neighborhood in Mexico City, Sunday, April 26, 2009. A fatal strain of swine flu has been detected in Mexico and experts fear it could become a global epidemic.
Police officers wearing a surgical mask guard the entrance to the Metropolitan Cathedral in Mexico City, Sunday, April 26, 2009. Churches stood empty Sunday morning in heavily Catholic Mexico City after services were canceled due to a new strain of swine flu that has people increasingly fearful and that health officials say could become a global epidemic.
A man stands inside a hospital wearing a protective face mask in Toluca, Mexico, Sunday, April 26, 2009. A fatal strain of swine flu has been detected in Mexico and experts fear it could become a global epidemic.
A woman wearing a surgical facemask stands next to an image of the Virgin of Guadalupe, Mexico's patron saint, at the Basilica of Guadalupe in Mexico City, Sunday, April 26, 2009. Churches stood empty Sunday in Mexico City after services were canceled, and health workers screened airports and bus stations for people sickened by a new strain of swine flu that experts fear could become a global epidemic.
Travelers entering the U.S. from Mexico cross a bridge at the San Ysidro Port of Entry in San Diego Sunday, April, 26, 2009. U.S. officials say they will begin asking travelers about illness if they're entering the country from regions with confirmed swine flu. The U.S. has declared a public health emergency, providing for easier access to flu tests and medications and increasing surveillance along the U.S.-Mexico border.
Dr. Richard Besser, acting director of the Center for Disease Control and Prevention, speaks in the White House Press Briefing Room during a news conference to discuss reported swine flu outbreaks, Sunday, April 26, 2009, in Washington. The U.S. is declaring a public health emergency to deal with the emerging new swine flu.
Ohio Governor Ted Strickland, center, talks during a news conference about a confirmed case of swine flu in Ohio with Ohio Emergency Management Agency Executive Director Nancy Dragani, left, Ohio Department of Public Safety Director Henry Guzman, Ohio Department of Health Director Dr. Alvin Jackson, and Ohio State Epidemiologist Dr. Forrest Smith at the Ohio Department of Health in Columbus, April 26, 2009.
A medical staff member wears a mask on April 27, 2009, at "La Fe" Hospital in Valencia, Spain, where a person with possible symptoms of swine flu is being treated. Spain's Health Ministry confirmed the country's first case of swine flu on Monday and said another 20 people are suspected of having the disease.
Policemen are wearing face masks at the Barcelona Airport in Barcelona, Spain, Monday, April 27, 2009. Health authorities in the country, as in most other places, are on alert following the swine flu outbreak in Mexico.
Pilots wearing masks arrive at Barajas Airport in Madrid Monday, April 27, 2009. Spain on Monday became the first nation outside North America to confirm a case of a swine flu, while countries from New Zealand to Israel quickly instituted new security measures at airports and put sick travelers under observation.
All arriving passengers are scanned visually as well as with the use of thermal scanners Monday, April 27, 2009, at the Changi International Airport arrival terminal in Singapore. The health ministry said it began using thermal scanners Sunday at Changi International Airport to check passengers arriving from the United States. A traveler with high temperatures would be given a thorough medical examination.
An Indonesian health official monitors arriving passengers with thermal scanners at Ngurah Rai International Airport in Denpasar, Bali, Indonesia, Monday, April 27, 2009. Indonesia increased surveillance at all entry points for travelers with flu-like symptoms.
Packets of anti-viral drug Tamiflu are seen in London, Monday, April 27, 2009. The British government is preparing for a possible swine flu outbreak in the UK and says it has enough flu drugs to treat one in two people, amid global fears of a possible swine flu pandemic following the deadly outbreak in Mexico.
Philippine Health Secretary Francisco Duque III gestures as he talks about the government's tightened monitoring of ports to prevent the entry of any hogs or pork from Mexico and the U.S. in Manila, Philippines on Monday April 27, 2009.
Health officials check passengers from Los Angeles through Taipei at the arrival hall of Kuala Lumpur International Airport in Sepang, Malaysia, Monday, April 27, 2009.
A newspaper headline of swine flu is seen on a downtown street in Hong Kong Monday, April 27, 2009. In Hong Kong, Thomas Tsang, controller for Hong Kong's Center for Health Protection, said the government and the territory's universities aim to jointly develop a quick test for the new flu strain in a week or two that will return results in four to six hours, compared to existing tests that can take two or three days.
A man washes his hands next to a flu warning poster outside a local hospital in Hong Kong Monday, April 27, 2009. Hong Kong has escalated its alert level to "serious" in response to the swine influenza outbreak in humans in Mexico and the U.S.
South Korea Livestock Health Control Association scientist gathers samples from imported Mexican pork at a store in Gwangju, South Korea, to send to National Veterinary Research and Quarantine Service for tests amid an outbreak of swine flu Monday, April 27, 2009.
A Filipino man applies oil on a row of roasted pigs to make them more attractive to buyers in Manila, Philippines, on Monday, April 27, 2009. Philippine health officials say the country remains free from swine flu as WHO warns countries around the world to be on alert of any unusual flu outbreaks after the virus was implicated in deaths of several people and an increasing case of infection spread in Mexico.
An Egyptian farmer watches his pigs at a private farm in Cairo, Egypt, Monday April 27, 2009. Egyptian health authorities are examining about 350,000 pigs being raised in Cairo and other provinces for swine flu.