Thanks to flu, China changes visa rules for US citizens

Andy Wong/AP

Chinese security officers wearing masks as a precaution against the swine flu stand guard in front of a sealed-off hotel, where foreign travelers were held under quarantine in Beijing, China, Tuesday, May 5, 2009. The American Embassy in Beijing said a pair U.S. citizens were quarantined in a hotel in a suburb of the city, while another two people who had earlier been kept in isolation in the southern cities of Guangzhou and Shenzhen were allowed to leave Monday.