Demographic characteristics, exposure history, use of personal protective equipment, and serum collection of 419 close contacts exposed to HPAI H5N1 case-patients, China, 2005–2008.

Data are no. (%) of close contacts, unless otherwise indicated. Percentages may not total 100 because of rounding.#Contact with well-appearing or sick/dead poultry was defined as direct contact (e.g. touching), or indirect contact which was defined as no physical contact, but being within 1 meter of poultry, poultry products, or poultry feces.*A wet poultry market was defined as a place where small animals and poultry may be purchased live or slaughtered at the market.