A vendor sells live chickens from local farms at the Kowloon City Market in Hong Kong in this file photo from 2015. Photo: Felix Wong A vendor sells live chickens from local farms at the Kowloon City Market in Hong Kong in this file photo from 2015. Photo: Felix Wong
A vendor sells live chickens from local farms at the Kowloon City Market in Hong Kong in this file photo from 2015. Photo: Felix Wong
China science

As bird flu outbreaks become more common in China and elsewhere, scientists debate the underlying cause

Experts argue whether blame for spread of virus lies with factory farming or live poultry markets

Topic |   China science
A vendor sells live chickens from local farms at the Kowloon City Market in Hong Kong in this file photo from 2015. Photo: Felix Wong A vendor sells live chickens from local farms at the Kowloon City Market in Hong Kong in this file photo from 2015. Photo: Felix Wong
A vendor sells live chickens from local farms at the Kowloon City Market in Hong Kong in this file photo from 2015. Photo: Felix Wong
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