Observations

On the basis of laboratory testing results, we identified all influenza A/H5–positive shops and an equal number of influenza A virus–negative shops by using a random number generator and a list of influenza A virus–negative shops. Field staff observed each selected shop for a 3-hour period during April 2015. Staff observed cleaning and disinfection activities of selected poultry shops during surprise visits at times when cleaning activities were scheduled. Field staffs were blinded to the laboratory test results of selected shops.