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Vaccination coverage among young homeless children compared to US national immunization survey data
Linda Y Fu1, Rachel Torres2, Susan Caleb2
1Goldberg Center for Community Pediatric Health, Children's National Hospital, 111 Michigan Ave., NW, Washington, DC 20010, USA; Center for Translational Science, Children's National Hospital, 111 Michigan Ave., NW, Washington, DC 20010, USA.
Insights
Vaccination coverage for homeless children in Washington D.C. is significantly lower than for other children, including those in poverty. This highlights a critical need for targeted vaccination programs for this vulnerable population.
Area of Science:
- Pediatrics
- Public Health
- Epidemiology
Background:
- Comprehensive vaccination coverage among homeless children in the U.S. is largely unknown.
- Previous studies suggest low coverage with single vaccinations in this population.
Purpose of the Study:
- To compare the vaccination coverage of a combined 7-vaccine series among homeless children in Washington D.C. (DC) to other U.S. children.
- To assess the risk of under-vaccination in children experiencing homelessness.
Main Methods:
- A cross-sectional survey of 135 homeless children aged 19-35 months in DC from 2018-2019.
- Vaccination records were obtained from healthcare providers.
- Coverage was compared to the 2018 National Immunization Survey (NIS) data for DC children, U.S. children, and U.S. children in poverty.
Main Results:
- Only 52.6% of homeless children in DC were up to date on their 7-vaccine series.
- This coverage was significantly lower (11.5-20.4 percentage points) than national estimates for all U.S. children, DC children, and children in poverty.
- Even after adjusting for age and race/ethnicity, DC homeless children had lower coverage than U.S. children in poverty.
Conclusions:
- Children experiencing homelessness are at heightened risk of under-vaccination compared to children in poverty.
- Targeted vaccination delivery support is crucial for children experiencing homelessness.
- Increased awareness of this risk can inform public health interventions.
Introduction:
Comprehensive vaccination coverage among homeless children in the United States (US) is largely unknown although a few studies suggest low coverage with single vaccinations. This study compared vaccination coverage with a combined 7-vaccines series among homeless children in the District of Columbia (DC) to coverage among other US children.
Materials And Methods:
A cross-sectional survey of homeless children in DC was conducted from 2018 to 2019. Recruitment occurred at housing shelters, social services centers, and a diaper dispensary, and through limited chain referral. English-speaking parents of a child aged 19 to 35 months who spent the majority of the last 30 nights homeless were recruited. Participants consented for their child's healthcare providers to submit vaccination records. The vaccination coverage estimate of this sample was compared with estimates of three populations in the 2018 National Immunization Survey (NIS): children in DC (NIS DC), children in the US (NIS US), and children in the US below the federal poverty level (NIS poor).
Results:
Most of the 135 children had experienced at least two lifetime episodes (63.7%) and 12 months (57%) of homelessness. The estimated percent up to date was 52.6% (95% CI: 43.8%, 61.3%). This estimate was 20.4 (95% CI: 11.9, 28.8, p < .0001), 20 (95% CI: 11.5, 28.4, p < .0001), and 11.5 (95% CI: 3.1, 20, p < .01) percentage points lower than estimates for the NIS DC, NIS US and NIS poor populations, respectively. After adjusting for child's age and race/ethnicity, vaccination coverage of the NIS DC sample was below that of NIS US (p < .01) and NIS poor samples (p < .05).
Conclusion:
Children experiencing homelessness may be at risk of under-vaccination, even when compared to a general population of children in poverty. Awareness of this heightened risk may allow for more precise targeting of vaccination delivery support specifically to children experiencing homelessness.
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