| Summary: | Background: Delayed vaccination in infants significantly increases the susceptibility window for vaccine preventable diseases. Objective: We conducted a retrospective audit of secondary data to determine the rates of delayed vaccination among infants reporting for routine immunization at an urban primary healthcare clinic in Delhi, India. Methods: Data were extracted from the manual register of the health clinic and entered in MS-Excel 2013. Results: We analyzed a total of 811 vaccination encounters in infants. Delayed vaccination was observed in 144 (17.8%) vaccination encounters. The proportion of delayed vaccination encounters progressively increased from penta-1 (lowest) to penta-3 (highest). However, the proportion of overall delayed vaccination encounters did not differ significantly across gender (P = 0.71). Conclusions: Delayed vaccination among infants continues to exist as a significant but largely avoidable public health challenge in certain health settings in India.
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