COVID-19 Booster Dose Coverage and Hesitancy among Older Adults in an Urban Slum and Resettlement Colony in Delhi, India

Background: The high prevalence of vaccine booster hesitancy, with the concomitant waning humoral or hybrid immunity, and emergence SARS-CoV-2 variants concern can accentuate COVID-19 morbidity mortality. study objective was to ascertain vaccination coverage, including administration precaution (booster) dose vaccination, among older population in an urban slum resettlement colony Delhi, India. Methods: We conducted a cross-sectional survey colony, slum, village cluster Northeast district Delhi residents aged ≥50 years. Results: A total 2217 adults (58.28%) had obtained (precaution) vaccine, 1404 (36.91%) received two doses without dose, 121 (3.18%) were unvaccinated, while 62 (1.63%) participants single dose. Based on adjusted analysis, (>65 years), higher education, per-capita income statistically significant predictors vaccination. Conclusions: More than four ten lacked despite rates double-dose (~95%). Public health programming should provide enhanced focus reducing complacency renewed prioritization for improving ease access services, particularly underserved areas.