Because members of the average household in Hong Kong shop in wet markets on a habitual basis, these markets are located in the most densely populated areas ( Figure) and are commonly multistory complexes or in basement levels of shopping centers. Because poultry workers are a potential bridge population (3, 4) , the government has instigated voluntary avian infl uenza training since 2001 that reviews regulations for workplace disinfection, waste disposal, poultry storage, and personal hygiene measures (5,6).