Health officers in full protective gear wait to cross a road near a wholesale poultry market in Hong Kong December 31, 2014. Hong Kong began culling 15,000 chickens on Wednesday and suspended imports of live poultry from mainland China for 21 days after the H7 bird flu strain was discovered in a batch of live chickens that came from the southern province of Guangdong. REUTERS/Tyrone Siu (CHINA - Tags: HEALTH FOOD AGRICULTURE ANIMALS POLITICS TPX IMAGES OF THE DAY)