Swine flu outbreak
A swine flu outbreak, later identified as the H1N1 virus, began in Mexico and spread to the U.S., Canada, Switzerland, the Netherlands, New Zealand, Britain, Germany, Spain, Israel and Austria. Here is how the world responded to the outbreak.
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Swine flu quarantine
Chinese security guards wearing masks guard the entrance as a worker in protective garment disinfects the area outside a hotel used to quarantine students from the Nanhu Zhongyuan Primary School in Beijing, China. Students from the school were quarantined after some of them were diagnosed with swine flu on Wednesday.