Three more human cases of H7N9 bird flu have added the tally to 28 in south China's Guangdong Province since the start of the year, according to the local authorities. Guangdong, which borders Hong Kong, has entered the high-incidence period for bird flu, which usually crops up in winter and spring seasons. The provincial health and family planning commission in a statement said that the three cases were reported last Wednesday in cities of Shenzhen, ...
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