A limitation of our study is that the VP1 genomic region of the viruses detected in CSF could not be obtained. In analogy to enteroviruses and parechoviruses, certain genotypes may be associated with distinct disease profi les, like polioviruses with encephalitis or parechovirus 3 with meningitis (14) . Although we were able to classify the virus detected in the child who died of SIDS as a common genotype 2, the partial hCV sequence from a patient with meningitis did not permit typing because hCVs, as all picornaviruses, recombine frequently (15) . We thus cannot exclude that the viruses detected in the meningitis cases may have acquired distinct features in their capsid protein or elsewhere that might infl uence pathogenicity. Knowledge of Avian Influenza (H5N1) among Poultry Workers, Hong Kong, China In 2009, a cross-sectional survey of 360 poultry workers in Hong Kong, China, showed that workers had inadequate levels of avian influenza (H5N1) risk knowledge, preventive behavior, and outbreak preparedness. The main barriers to preventive practices were low perceived benefits and interference with work. Poultry workers require occupation-specific health promotion. In 2009, a cross-sectional survey of 360 poultry workers in Hong Kong, China, showed that workers had inadequate levels of avian infl uenza (H5N1) risk knowledge, preventive behavior, and outbreak preparedness. The main barriers to preventive practices were low perceived benefi ts and interference with work. Poultry workers require occupationspecifi c health promotion. I n 1997, a zoonosis in humans caused by a highly lethal strain of avian infl uenza virus (H5N1) was reported in Hong Kong. Live-poultry markets were the source of this outbreak (1) . As one of the world's most densely populated regions (16,000 persons/mile 2 [>6,300 persons/km 2 ]) (2), Hong Kong is a city at high risk for a large-scale outbreak of avian infl uenza caused by live poultry in large-volume wholesale markets and within neighborhood wet markets (open food stall markets).