Adult, Asia, China - East Asia, Chinese Ethnicity, City
Hong Kong, China - September 27, 2011: Woman with mask among other passengers in subway train in Hong Kong. In 1997 the Avian influenza or bird flu virus H5N1 was discovered in Hong Kong from an human patient. Concern raised dramatically when the mortaly rate was 30٪ of the first 18 cases. Millions of poultry were killed to stop the disease. The population is still very cautious nowadays.