||Priorities for national coverage assessment
include monitoring coverage of preschool children and in particular
incorporating new vaccines as recommended and serving as an evaluation tool
for the Vaccines for Children Program. Coverage assessment must also be
conducted for adolescent vaccines, particularly during the recommended 11-12
year preventive service visit. CDC plans to conduct annual adolescent
coverage surveys beginning in 2006. Assessment of urban areas and expansion
to other urban and rural areas is important. This may be accomplished by
rotating in new IAP areas or through small-area statistical methods.
Response rates for the NIS need to be maintained and improved upon if at all
possible. This might be accomplished by offer incentives for participation,
cognitive interviewing, caller ID experiments, analysis of call history
data, and using more efficient call patterns and times. Additionally,
research exploring potential non-response bias needs to be conducted which
might allow for statistical adjustments to compensate for bias.