Chickens are sold at a a live poultry stall in Kowloon City wet market. Photo: Edward Wong

H7N9 bird flu found to spread through the air

Virus can also infect pigs, say HKU researchers, who warn officials to maintain tight scrutiny even though threat seems under control

Topic |   H7N9 virus

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Chickens are sold at a a live poultry stall in Kowloon City wet market. Photo: Edward Wong
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