The findings in this report, based on 2005 NHIS data, include the first national estimate of influenza vaccination coverage in children with current asthma. The analysis indicated a lower coverage rate (29.0%) during the 2004-05 influenza season than a previous study based on BRFSS data (34.8%) that included children with conditions placing them at high risk for influenza complications.5 Because BRFSS and NHIS have different survey methodologies, a difference was not unexpected. The BRFSS analysis included children with conditions other than asthma, including other lung problems, heart problems, diabetes, kidney problems, a weakened immune system, anemia, or aspirin therapy for chronic conditions. In addition, this study based on NHIS data used September-February as its time frame for influenza vaccination, whereas the BRFSS study used September-January. Finally, BRFSS is conducted in all states and DC, whereas NHIS uses a sampling method designed to produce an accurate national estimate without including all states.