Health workers in full protective gear slaughter chickens by using carbon dioxide at a wholesale poultry market in Hong Kong, Tuesday, Jan. 28, 2014. Hong Kong authorities began culling 20,000 birds ... more 
Health workers in full protective gear slaughter chickens by using carbon dioxide at a wholesale poultry market in Hong Kong, Tuesday, Jan. 28, 2014. Hong Kong authorities began culling 20,000 birds at the wholesale market after poultry from southern mainland China tested positive for the H7N9 virus, the first time it had been found in imported poultry in Hong Kong. (AP Photo/Vincent Yu) less 
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Associated Press | Photo By Vincent Yu
Tue, Jan 28, 2014 12:39 AM EST