Swine Flu Outbreak

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    April 27, 2009: A passenger arriving on a flight from Mexico wears a mask at Barcelona's airport. A case of swine flu has been confirmed in a patient in Spain and 17 sick people are under investigation, the Health Ministry said.

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    April 27, 2009: A medical worker takes the temperature of a woman at the airport in Taoyuan. Taiwan took steps to ward off the new swine flu virus by raising the warning level on travel to Mexico and strengthening quarantine inspections on travelers from Mexico and the U.S.

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    April 26, 2009: Senior microbiologist for the county of San Diego Health and Human Services Agency, Anna Liza Manlutac, begins her testing for influenza at the county health lab in San Diego, California. Governments around the world rushed on Sunday to check the spread of a new type of swine flu that has killed 103 people in Mexico and infected about 20 others in the United States.

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    April 26, 2009: A biohazard sign on a sample box is seen at the County of San Diego Health and Services Agency in San Diego, California.

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    April 26, 2009: A masked Edison High School student who wished not to be identified leaves New York Hospital Queens after being diagnosed with the flu, and, according to his guardian, will await test results to determine if it is of the swine flu strain.

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    April 26, 2009: A student from St. Francis Prep in Queens, New York arrives with his father only to find that class had been canceled. New York City was dealing with a growing public health threat Sunday after tests confirmed that eight students at the private Catholic high school had contracted swine flu. Some of the school's students had visited Mexico on a spring break trip two weeks ago.

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    April 24, 2009: Mexico closed its schools across its capital Friday after the swine flu outbreak began to unfold.

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    April 24, 2009: A woman and her daughter wear masks as they walk toward the hospital in Mexico City. The World Health Organization is worried that this outbreak could mark the start of a flu pandemic.

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    April 24, 2009: A girl wears a mask as she walks along a street in Mexico City.

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    April 24, 2009: A woman walks past a closed school in Mexico City. Mexican Health Minister Jose Angel Cordova said schools and universities in Mexico City and the surrounding area would be temporarily closed, and advised people with flu symptoms to stay home from work.

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    April 24, 2009: Mexico's flu season normally ends in February or March, but it has extended longer this year, the government said. "We recommend avoiding places or events with a lot of people unless strictly necessary," Cordova told the media.

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    April 24, 2009: Women wear masks as they walk past a closed school in Mexico City. Symptoms of swine flu in people are similar to those of seasonal influenza — sudden onset of fever, coughing, muscle aches and extreme tiredness. Swine flu appears to cause more diarrhea and vomiting than normal flu.

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    April 24, 2009: People wear masks as they walk outside the general hospital in Mexico City. On Friday, WHO also raised its internal alert system, enabling the agency to divert more money and personnel to dealing with the outbreak.

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    April 24, 2009: This colorized image from a transmission electron micrograph (TEM) depicts the A H1N1 "swine flu" virus from a previous outbreak in 1976, was released by the U.S. Centers for Disease Control.