Abstract : Lower respiratory tract infections are one of the commonest causes of mortality and morbidity in children. India has one of the largest universal immunisation programs in the world in terms of the number of beneficiaries covered, quantities of vaccines used, and human resources involved. To study the clinical spectrum of LRTI in children. To evaluate the immunisation status of children and to correlate the pattern of LRTI with radiological findings. All patients with LRTI were admitted to NKPSIMS & LMH & Research Centre, Nagpur in the Department of Paediatrics during the study period. In our study, we found that 23.18% were completely immunised, 69.5% were immunised partially and 7.27 % of children were non immunised which was statistically significant. For individual diagnosis of LRTI those that were completely immunised were less in number as compared to partially and non-immunised in each category. The difference was statistically significant.