Immunization barriers in a family practice residency clinic

Area of Science:

• Pediatric Medicine
• Public Health
• Immunization Practices

Background:

• Underimmunization was identified as the primary driver of the 1990 measles outbreak in the United States.
• This study investigates the prevalence and underlying causes of underimmunization within a family practice residency clinic that had access to free vaccine supplies.

Purpose of the Study:

• To determine the level of underimmunization in a specific family practice residency clinic.
• To identify the key barriers contributing to delayed childhood immunizations in this setting.

Main Methods:

• A sample of 175 patients aged 2 to 3 years was selected from 286 identified patients.
• Patient charts were audited to identify immunization barriers, including valid reasons, contraindication misinterpretations, missed opportunities, parental refusal, and clinic attendance gaps.

Main Results:

• A total of 174 delayed vaccine doses were recorded.
• The primary reasons for delays included gaps in clinic attendance (90 doses), valid reasons (42 doses), invalid contraindications (33 doses), and missed opportunities (25 doses).
• Some vaccine doses were delayed multiple times for various reasons.

Conclusions:

• Significant contributors to delayed immunizations in the residency clinic were identified as gaps in patient attendance.
• Overly strict interpretations of contraindications, missed opportunities during acute care visits, and failure to administer vaccines simultaneously also played a key role.
• These factors highlight areas for intervention to improve childhood vaccination coverage.